Question

Give answer with method(Answer the Circled one)

Answer 1

2.

15z-21-18z+11=12z-52

-21+11+52=12z-15z+18z

63-21=15z

42=15z

z=42/15

Answer 2

$3(5z-7)-2(9z-11)=4(8z-13)-17\\\\15z-21-18z+22=32z-52-17\\\\15z-18z-32z=21-22-52-17\\\\15z-50z=4-74\\\\-35z=-70\\\\z=\frac{-70}{-35}=2$

$\\\\\\\\\\\\\\\\\\-(\frac{y-1}{2})+y=1-(\frac{y-2}{3})\\\\(\frac{-y+1}{2})+y=\frac{3-(y-2)}{3}\\\\\frac{-y+1+2y}{2}=\frac{3-y+2}{3}\\\\\frac{y+1}{2}=\frac{5-y}{3}\\\\3y+3=10-2y\\\\3y+2y=10-3\\\\5y=7\\\\y=\frac{7}{5}=1.4$