Question

解方程 90-20%x=80 x-25%=21 x+60x=3.2 70%x+46=60 (1-75%)x=36 3x+

Answer 1

90-20%x=80

20%x=10

x=50

x-25%=21

x=21+25%

x=21+0.25

x=21.25

x+60x=3.2

61x=3.2

x=16/305

70%x+46=60

70%x=14

x=14÷0.7

x=20

(1-75%)x=36

0.25x=36

x=144

3x+40%=23.8

3x+0.4=23.8

3x=23.4

x=7.8