Algebra 1 a

Need help to solve can anyone help me please 6x-9y = 25.5 7y-2x =-10.0 solve the elimination method

  1. 👍 0
  2. 👎 0
  3. 👁 149
  1. Eq1: 6X - 9Y = 25.5,
    Eq2: -2x + 7y = -10.

    Multiply Eq2 by 3:
    6X - 9Y = 25.5.
    -6X + 21Y = -30.
    Sum: 12y = - 4.5,
    Y = 0.375.

    In Eq2, substitute 0.375 for y:
    -2X + 7*0.375 = - 10,
    -2X = -10 -0.375 = -10.375,
    X = 5.1875.

    Solution Set: (x,y) = (5.1875,0.375).

    1. 👍 0
    2. 👎 0
  2. CORRECTION:
    In Eq2, substitute 0.375 for y:
    -2X + 7*0.375 = -10,
    -2X + 2.625 = -10,
    -2X = -10 - 2.625 = -12.625.
    X = 6.3125.

    Solution Set: (x,y) = (6.3125,0.375).

    =

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math check please

    1. Solve the system of equations y=2x^2-3 y=3x-1 a)no solution b)(-1/2,5),(2,-5/2) c)(-1/2,-5/2),(2,5)**** d)(1/2,5/2),(2,5) 2. How many real number solutions are there to the equation 0=-3x^2+x-4? a)0 ***** b)1 c)2 d)3 3.solve

    asked by Kendra on March 19, 2015
  2. How do I do this.?(Math.)

    Use the Substitution method to solve the system of equations. y - 2x = -5 3y - x = 5 Solve one of the equations for x or y. Let's solve the first one for y: y - 2x = -5 y = 2x - 5 Now let's substitute 2x - 5 for y in the second

    asked by Margie on February 5, 2007
  3. Algebra

    To solve the system of equations, which expression could be substituted for x into the first equation? 3x-5y=14 x+4y=10 a)10-4y b)4y+10 c)(1/4)x+(5/2) d)(-1/4)x+(5/2) I have another problem just like this one so if you could

    asked by maddie on July 27, 2007
  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 1!PLZ HELP!

    Use the Substitution method to solve the system of equations. y - 2x = -5 3y - x = 5 Solve the first equation for y. y = 2x-5 Substitute that for y in the second equation and solve for x. Then use the value of x to substitute back

    asked by SANDRO! on November 6, 2006
  1. maths

    1.solve the set of linear equation by matrix method.a+3b+2c=3,2a-b-3c=-8,5a+2b+c=9 solve for a,b,c 2.solve by Guassian elimination method, (a)a+2b+3c=5,3a-b+2c=8,4a-6b-4c=-2, (b)

    asked by emmanuel konwei on March 3, 2015
  2. Algebra

    There are 4 problems that I don't understand how to solve so, please help me. A numerical explanation with words explanation would be nice. Thank you tutors. Rewrite each equation so it is in the form ax + b = c or x + d/e = f,

    asked by anon on December 9, 2015
  3. Math

    I need help with these three problems. They are on a Study Guide and I need some refreshing up of how to do them. 17. Solve the equation using the zero product property... -8n(5n+3) 19. Solve the equation by factoring 5z^2-2z-3=0

    asked by Amy on May 26, 2009
  4. algebra

    solve for the indicated variable: a. temperature formula solve for F: K=5/9(F-32)+273 b. annual interest rate solve for R: A=P+Prt

    asked by narmin on September 24, 2009
  5. Rational Zero Theorem

    I know how to solve if the leading coefficient is 1, but how would i solve it if its not 1. Ex. f(x) = 2x^3 + 7x^2 - 7x + 30 Can someone help me start that out? Then I'll use synthetic divison to solve for it.

    asked by Chopsticks on January 13, 2009
  6. math

    Eight subtracted from six times a number is -134. What is the number? A) Translate the statement above into an equation that you can solve to answer this question. Do not solve it yet. Use x as your variable. solve for x

    asked by kelly on February 21, 2013

You can view more similar questions or ask a new question.