SOLUTION: Solve the system using any algebraic method: 7x+5y=-12 3x-4y=1

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Question 105005This question is from textbook McDougal Littell Algebra 2
: Solve the system using any algebraic method:
7x+5y=-12
3x-4y=1 This question is from textbook McDougal Littell Algebra 2

Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
7x+5y=-12
3x-4y=1
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We will go ahead and use elimination;
Multiply first equation by 4;
28x+20y=-48
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Now the second equation by 5;
15x-20y=5
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now add each together;
28x+20y=-48
15x-20y=5
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43x=-43
x=-1
Now plug that answer into either original equation forx;
3(-1)-4y=1
-3-4y=1
-4y=4
y=-1
answer; x=-1, y=-1
:)