Question

x-30%x=4分之3 3-70%x=0.2 50%x+25=80方程

Answer 1

x-30%x=4分之3

70%x=3/4

7/10x=3/4

x=3/4÷7/10

x=3/4×10/7

x=15/14

3-70%x=0.2

70%x=3-0.2

0.7x=2.8

x=2.8÷0.7

x=4

50%x+25=80

0.5x=80-25

0.5x=55

x=55÷0.5

x=110

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