megatronpie
megatronpie
27-04-2017
Mathematics
contestada
X-y=3
X+2y=-6
Solve using substitution
Respuesta :
antonio9990
antonio9990
27-04-2017
X-y=3=>x=3+y
X+2y=-6
=========
3+y+2y=-6
3+3y=-6
3y=-6-3
3y=-9
y=-3
X+2y=-6
X+2(-3)=-6
X-6=-6
X=0
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