Question

解方程：x-15%x=34 x+120%z=180 40%x=60 70%x-45%x=100 1/4x+20%x=9

Answer 1

x-15%x=34

x=40

x+120%z=180

(题目有误,请审核原题)

40%x=60

X=150

70%x-45%x=100

X=400

1/4x+20%x=9

X=20

30%x=9

X=30

70%x-55%x=180

X=1200

x+40%x=420

X=300