SOLUTION: Solve The System of Equations. 2x + 3y = 12 x + 2y = 7 I have gotten this far. <Write the System as a matrix equation.> [2 3] [x] = [12] [1 2] [y] = [7 ] <Find A-1.> [2 -

Algebra ->  Linear-equations -> SOLUTION: Solve The System of Equations. 2x + 3y = 12 x + 2y = 7 I have gotten this far. <Write the System as a matrix equation.> [2 3] [x] = [12] [1 2] [y] = [7 ] <Find A-1.> [2 -      Log On


   

Question 81582This question is from textbook Prentice Hall Mathmatics Algebra 2
: Solve The System of Equations.
2x + 3y = 12
x + 2y = 7
I have gotten this far.

[2 3] [x] = [12]
[1 2] [y] = [7 ]

[2 -3]
[-1 2]
*I am so confused please help* This question is from textbook Prentice Hall Mathmatics Algebra 2

Answer by vertciel(183) About Me  (Show Source):
You can put this solution on YOUR website!
Hello there,
Thank you for your attempt: this shows that you have tried to solve the problem. Effort is crucial.
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Are you trying to use the Cramer's Rule? Unless you must do so, you can just solve this system by elimination.
2x + 3y = 12 --(1)
x + 2y = 7 ----(2)
Multiply (2) by -2 so I can add both equations and eliminate x.
(2) : -2x - 4y = -14
(1) + (2): -y = -2
y = 2
Try now to find x.