Algebra 1 HELP PLZ!!!

Use the Substitution method to solve the system of equations.

x + y = -4
x - y = 2

PLz HELP!!

I'M NOT BOB BUT I CAN HELP

ITS REALLY SIMPLE ALGEBRA

X + Y = -4......EQN 1
X - Y = 2.....EQN 2

From EQN 2, let
x = 2 + y

Substitute that into EQN 1

x - y = -4
(2+y) + y= -4
2 + 2y= -4
2y = -4-2
y = -6/2
y = -3

SUBST y= -3 in EQN 2

x -(-3) = 2
x + 3 = 2
x = 2-3

x= -1

Therefore

y = -3 and x = -1


x + y = -4
(2+y) + y= -4
2 + 2y= -4
2y = -4-2
y = -6/2
y = -3


Thanks,what abou this one?

Use the Substitution method to solve the system of equations.

x + y = 10
y = x + 8

Thanks,what abou this one?

Use the Substitution method to solve the system of equations.

x + y = 10
y = x + 8

just use the ones she helped you with before.

minus y on each side of one equation (IE x+y=10 is now x=10-y.

then fill in the 10-y for x in the second equation.

May be 2

help


x+y=10
y=x+8
I think it goes like this
x+x+8=10
2x+8=10
2x=10-8
2x=2 divide both sides by 2
x=1
1+y=10
y=10-1
y=9
x+y=10 replaced 1+9=10
y=x+8 replaced 9=1+8
was this a real problem to solve, or are you just testing me?

x+y=10
y=x+8
I think it goes like this
x+x+8=10
2x+8=10
2x=10-8
2x=2 divide both sides by 2
x=1
1+y=10
y=10-1
y=9
x+y=10 replaced 1+9=10
y=x+8 replaced 9=1+8
was this a real problem to solve, or are you just testing me?

x+y=10
y=x+8
I think it goes like this
x+x+8=10 (y is replaced by x+8)
2x+8=10 (add the x's to get 2x)
2x=10-8 (move 8 to the other side)
2x=2 divide both sides by 2
x=1
1+y=10
y=10-1
y=9
x+y=10 replaced 1+9=10
y=x+8 replaced 9=1+8
was this a real problem to solve, or are you just testing me?

x + 2 = -4 x - (-4) = 2
x + 2 - 2 = -4 - 2 x - (-4) + 4 = 2 + 4
x = 6 x = 6

checked: checked:
(-6) + 2 = -4 (6) - (-4) = 2
-4 = -4 2 = 2

  1. 👍 0
  2. 👎 0
  3. 👁 216
asked by Margie
  1. HELP ME PLEASE.

    2x = 10

    1. 👍 0
    2. 👎 0
    posted by Sania
  2. A library has 14,588 books which fill 313 qual-size shelves. what is the average number of books per self?

    1. 👍 0
    2. 👎 0
    posted by britney

Respond to this Question

First Name

Your Response

Similar Questions

  1. Linear Equations

    Can you please help solve this equation using the substitution method? I have tried and keep getting that X and Y = 7/2, but the answer in the book states no solution, inconsistent system. What am I doing wrong? Please help! Solve

    asked by Mia on March 2, 2010
  2. Algebra PLEASE HELP!!

    What advantages does the method of substitution have over graphing for solving systems of equations? Choose the correct answer below. A. Graphing cannot be used to solve dependent or inconsistent systems due to the nature of the

    asked by zwgz123 on December 15, 2017
  3. algebra

    i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y - 1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of

    asked by Alyssa on April 5, 2011
  4. Substitution Method-Plz help

    Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 solve for x in the second equation. x= y+2 Put that in for x in the first equation: x+y=-4 (y+2) + y = -4 solve for y. Then, x= y+2 i don't get

    asked by Svetlana on October 17, 2006
  5. algebra

    Can someone help me figure this out please? when you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent? thank you anyone

    asked by don on March 18, 2012
  6. calculus

    When using the substitution method to solve a nonlinear system of equations, you should first see if you can _____ one variable in one of the equations in the system.

    asked by heaven on January 28, 2010
  7. algebra

    When you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent?

    asked by algebra on March 21, 2012
  8. algebra

    when you solve a system of equations by the substitution method, how do you determine whether the system of equations is dependent?

    asked by Stephanie on October 28, 2010
  9. Algebra

    I can find no solution to this system of equations. Solve the system of equations using the substitution method 2x + 4y = -2 2x - y = 4

    asked by slomo on January 7, 2015
  10. algebra

    Can someone please help. When you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent? Thanks

    asked by algebra need help on March 1, 2012

More Similar Questions