MATH

I still don't know how to completely solve systems by substitution. Can someone please help me?

1. Y=-11+x
3x+10y=-6
How would you know where to plug in the right section of the equation in a certain place?

2. Y =6x-5
Y =-x+9

  1. 0
  2. 0
  3. 1
asked by Anonymous
  1. substitute the value of a variable from one equation into the other equation. For #1, we are told

    y = x-11

    So, substitute that into the other equation, and we have

    3x + 10(x-11) = -6
    3x + 10x - 110 = -6
    13x = 104
    x = 8
    So, y = x-11 = 3
    Be sure to check the solution to make sure it satisfies both original equations.

    Now do #2 in just the same way.

    1. 0
    2. 0
    posted by Steve
  2. Okay! On #2 how would you set it up since there's no equal signs

    1. 0
    2. 0
    posted by Anonymous

Respond to this Question

First Name

Your Response

Similar Questions

  1. 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
  2. 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
  3. 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
  4. math

    Solve systems by substitution 5x - 2y = -5 y - 5x = 3 Substitute 5x + 3 for y in the first equation, and solve it for x. Once you have x, use either of the two equations you wrote to solve for y.
  5. Math

    Solve the systems using substitution. 1.6x + 2y = -2 4x + y = 1
  6. math

    (Systems) how do I solve 5x+3y=2 and x+2y=6 using substition This is what I did X+2y=6 eq.1 5x+3y=2 eq.2 X=-3y/5 Sub(x=-3y/5) into eq.1 -3y/5 + 2y=6 7/5y=6 y=30/7 Sub(y=30/7) into eq.2 5x+3(30/7)=3 5x+90/7=3 5x=-69/7 x= -68/35 The
  7. algebra 1

    I was just wondering if anybody could explain to me the steps in 'solving systems in substitution' and 'solving systems in substitution with a variable'. I'm majorly confuzled!!!! It might help to post a specific problem so
  8. algebra

    Solve the following systems by substitution. 4x-12y=5 -x+3y=-1
  9. Math

    Solve the integral of (x*e^2x)/(1+2x)^2 by first using u substitution and then use integration by parts. I am very confused on how to do u-substitution with this because no mattter what I let u be equal to the du never comes out
  10. Math - Geometric Vectors

    Find the length and the direction of the resultant of each of the following systems of forces: a) forces of 3 N and 8 N acting at an angle of 60° to each other I'm completely lost. I don't know how to solve this question using

More Similar Questions