SOLUTION: 3x + 2y= -2 15x +6y= 12 answer:( 3, -11/2) need a full break down of how my book came up with these solutions

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Question 186757: 3x + 2y= -2
15x +6y= 12


answer:( 3, -11/2)

need a full break down of how my book came up with these solutions
Answer by checkley77(12569) About Me  (Show Source):
You can put this solution on YOUR website!
3x + 2y= -2 multipy this equation by -3 & add them.
15x +6y= 12
-9x-6y=6 [this equation is the 3x+2y=-2 equation multiplied by -3]
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6x=18 this equation is the sum of the 2 equations above.
x=18/6
x=3 ans.
3*3+2y=-2
9+2y=-2
2y=-2-9
2y=-11
y=-11/2
y=-5.5 ans.