Respuesta :

5. the first equation gives you the value of y. So plug in the value of y into the second equation:
3x+2(-x-7)=3.
Simplify: 3x-2x-14=3.
Subtract: 1x-14=3.
Add 14 to both sides: x=17.
Now you know the x value.
You plug in the x value into the first equation: y=-17-7
Solve: y=-24
Answer: 17, -24
MohamedSharif
#5)3x+2(-3-7)=3
3x-7+14=3
3x+7=3
3x=3-7
3x=-4
x=-1.3

-1.3+2y=3
2y=3+1.3
2y=1.7
y=0.8

#7)(use elimination method)
x=11
6x+y=17
6(11)+y=17
66+y=17
y=17-66
y=-49
answer is X=11 and Y=-49