Question

Resolva os sistemas de equaçoes:

f)x+y=6
x-y=2

g)-2×-2y=-64
4+2y=88

Me AJUDEM

Answer 1

f)x+y=6
x-y=2
basta somar as equações:
2x= 8
x=8/2
x=
8-y=2
-y=2-8
-y=-6
y=6


g)-2×-2y=-64
4x+2y=88
2x=14
x=14/2
x=7
4x+2y=88
4*7+2y=88
28+2y=88
2y= 88-28
2y=60
y=60/3
y=20

Answer 2

F) 2x= 8
x=8/2
x=4


4+y=6
Y=6-4
Y=2


G) seria 4x?

2x=24
x=24/2
x= 12

4(12)+2y=88
48+2y=88
2y=88-48
2y=40
y= 40/2
y=20