robaynosd
robaynosd
27-01-2017
Mathematics
contestada
-7x-2y=-13 what is the
x-2y=11
Respuesta :
wolf1728
wolf1728
27-01-2017
A) -7x-2y= -13
B) x-2y= 11
Multiply equation B by -1
A) -7x -2y = -13
B) -x +2y = -11
Add the equations
-8x = -24
X = 3
Putting X =3 into Equation B
B) -3 + 2y = -11
2y = -8
y = -4
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