Question

Resolva a Equação de 1° grau
3.(6+3y)+2=2.(y-9)-1

Answer 1

3.(6+3y)+2=2.(y-9)-118 + 9y + 2 = 2y  - 18 - 1 
9y + 20 = 2y - 19
9y - 2y = -19 - 20
7y = -39
y = -39 / 7

Resposta : y = -39/7

Answer 2

3.(6+3y)+2=2.(y-9)-1
18+9y+2=2y+18-1
20+9y=2y+17
9y-2y=17-20
7y=-3
y=-3-7
y=-10