Question

3y -20 = - (y + 80)
Resolva a equação

Answer 1

Boa tarde.

3y - 20 = - (y + 80)

3y - 20 = - y - 80

3y + y = - 80 + 20

4y = - 60

y = - 60 / 4

y = - 15

Answer 2

3y-20=(y+80)

3y-20=-y-80

3y+y=-80+20

4y=-60

y=-60/4y

y=-15