2x+0.4x=48(并检验)8x-x=14.7 35x+13x=9.6 5(x+3)=35x+3.7x+2=16.11
3个回答

2x+0.4x=48

2.4x=48

x=48/2.4

x=20

8x-x=14.7

7x=14.7

x=14.7/7

x=2.1

35x+13x=9.6

48x=9.6

x=0.5

5(x+3)=35

5x+15=35

5x=35-15

x=20/5

x=4

x+3.7x+2=16.1

4.7x+2=16.1

4.7x=16.1

x=3

14x+3x-12x=158

5x=158

x=31.6

18-2.5x=13

2.5x=18-13

x=5/2.5

x=2

9.5x-5x=27

4.5x=27

x=6

1.5x-6=3

1.5x=3+6

x=9/1.5

x=6

7x-0.6x=16

6.4x=16

x=2.5

写检验过程时把值带进去