Question

por favor gente e pra manhã me ajudem
A) x-3y=a
2x+3y=6

B)2X+Y=-3
X+Y=1


C)X+Y=2
3X+2Y=6


D)X-Y+5
X+Y=7


E)X-Y+2
2Y-Y+4



F)X+Y=3
2X+3Y=8


G)X+Y=7
X-Y+=1

Answer 1

b)-2x-y=3 x+y=1 c)-2x-2y=-4 3x+2y=6
x+y=1 4+y=1 3x+2y=6 2+2y=6
-x=4 y=1-4 x=2 2y=6-2
x=4 y=-3 2y=4
y=4/2
y=2
f)-3x-3y=-9 2x+3y=8 g)2x=8 x+y=7
2x+3y=8 1+3y=8 x=8/2 4+y=7
-x=-1 3y=8-1 x=4 y=7-4
x=1 3y=7 y=3
y=7/3