Question

15(y-4)-2(y-9)+5(y+6)=0

Answer 1

15y-2y+5y-60+18+30=0
18y-12=0
y=2/3

Answer 2

15y - 60 - 2y + 18 + 5y + 30

15y - 2y - 5y - 60 + 18 + 30

18y - 12

18y = 12                        "12 becomes positive after becoming RHS "

y = 12/18

y = 2/3