Nikki1112
Nikki1112
06-12-2016
Mathematics
contestada
Solve: 3x-3y=3
y=-5x-17
Respuesta :
blahboy1429
blahboy1429
06-12-2016
Substitute y = -5x - 17 into the first equation:
-3x - 3y = 3
-3x - 3*(-5x - 17) = 3
-3x + 15x + 51 = 3
-3x + 15x = 3 - 51
12x = -48
x =-48/12 = -4
y = -5x - 17 = -5*(-4) - 17 = 20 - 17 = 3
so the solution is x = -4, y = 3
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