Respuesta :

Santiago87

Answer:

x= -3

Step-by-step explanation:

you replace y with -2 as the output

then subtract the 7 on both sides to have '-9=3x'

divide by 3 on both sides

x= -3

nrajpal

Answer:

x=-3

Step-by-step explanation:

y=3(-3)+7

y=-9+7

y=-2