4.2-0.6x=3.6x 5x+2x=33.6 7x-4x=0.75 2x+7x+2.1=12 56x-32x-119
2个回答

4.2-0.6x=3.6x

4.2=4.2x

x=1

5x+2x=33.6

7x=33.6

x=4.8

7x-4x=0.75

3x=0.75

x=0.25

2x+7x+2.1=12

9x=14.1

x=14.19

56x-32x-119=361

24x=480

x=20

x+5=2x

5=x

4x-28=2x

2x=28

x=14

2x+18=7x

18=5x

x=85

5x=25*4-15x

20x=100

x=5

7x-x+2*3=29.4

6x+6=29.4

6x=23.4

x=23.46

(28.8+5.5x+3.2)除2=71

14.4+2.25x+1.6=71

2.25x=55

x=552.25