idk137
idk137
22-10-2016
Mathematics
contestada
6y+5x=8 x3y=-7 use substituion
Respuesta :
zexius
zexius
22-10-2016
Substitution:
6y + 5x = 8
x + 3y = -7
x = -3y + 7
6y + 5(-3y + 7) = 8
6y - 15y + 35 = 8
-9y + 35 = 8
-9y = -27
-y = -3
y = 3
x = -7 + 9
x = 2
y = 3
x = 2
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