Question

10=5y-4+10y+15y-20 valendo 10 pontos

Answer 1

10=5y-4+10y+15y-20   invertendo a ordem para facilitar

5y-4+10y+15y-20 = 10

5y +10y +15y = 10 +4 +20

30y = 34

y = 34 / 30

y = 17 / 15

Answer 2

5y - 4  +10y + 15y - 20 =10
30y = 10 + 4 + 20
30y = 34
y = 34/30 = 17/15 ***