what is (6g-9)=1/3(15-9g)

(6g-9)=1/3(15-9g)     multiply both sides by 3

3(6g - 9) = 15 - 9g

18g - 27 = 15 - 9g     add 9g and 27 to both sides

27g = 42                   divide both sides by 27

g = 42/27 =   14/9