Question

解方程.百分之50x=11.6 百分之35x=4 x-百分之75x=28 1/5x-百分之20=7.5

Answer 1

50%x=11.6

0.5x=11.6

x=11.6÷0.5

x=23.2

百分之35x=4

0.35x=4

x=4÷0.35

x=80/7

x-百分之75x=28

x-0.75x=28

0.25x=28

x=28÷0.25

x=112

1/5x-百分之20=7.5

0.2x-0.2=7.5

0.2x=7.5+0.2=7.7

x=7.7÷0.2

x=38.5