Question

88-7x=5x-20 4(4x-11)=3(22-2x) 9.4乘[1.28-(x-0.31)]=0.47

Answer 1

88-7x=5x-20

108=12x

x=108/12

x=9

4(4x-11)=3(22-2x)

16x-44=66-6x

22x=110

x=5

9.4乘[1.28-(x-0.31)]=0.47

9.4*(1.59-x)=0.47

1.59-x=0.47/9.4

1.59-x=0.05

x=1.64