Question

六题解方程：x+75%x=140 x-40%x=96 x-76%x=36 4x+50%x=90 60%x-30=120

Answer 1

x+75%x=140

7x/4=140

x=140*4/7

x=80

x-40%x=96

0.6x=96

x=96/0.6

x=160

x-76%x=36

2.4x=36

x=36/2.4

x=15

4x+50%x=90

4.5x=90

x=90/4.5

x=20

60%x-30=120

0.6x=120+30

0.6x=150

x=150/0.6

x=250

x+50%x=45

1.5x=45

x=45/1.5

x=30