Question

这些解方程怎么解21+4x=492/3x×3/5=8 6x-3/2x=543.7-0.5x=162.4x-2.8=3.2

Answer 1

21+4x=49

4x=28

x=7

2/3x×3/5=8

2x/5=8

x=20

6x-3/2x=54

4.5x=54

x=12

3.7-0.5x=16

0.5x=12.3

x=24.6

2.4x-2.8=3.2

2.4x=6

x=5/2

3x-5×=6.5

-2x=6.5

x=-3.75