Tinamay0622 Tinamay0622

10-10-2016
Mathematics

contestada

x=-12-6y
-4x+5y=-39
slove by the system of substitution

Respuesta :

Panoyin Panoyin

10-10-2016

x = -6y - 12
4x + 5y =-39

4x + 5y = -39
-4(-6y - 12) + 5y = -39
-4(-6y) + 4(12) + 5y = -39
24y + 48 + 5y = -39
29y + 48 = -39
29y = -87
y = -3

x = -6y - 12
x = -6(-3) - 12
x = 28 - 12
x = 6

(x, y) = (6, -3)

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