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solving systems of equations by substitution how do you do it

Algebra
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-7x - y = 13  8x + y =  -14

Jan 29th, 2015

-7x-y =13

y =-7x-13

8x+(-7x-13) =-14

x-13 =-14

x =-14+13 =-1

y = -7*(-1)-13 =7-13 = -6

x= -1 , y= -6

Jan 29th, 2015

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Jan 29th, 2015
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