Question

解方程 7x+5.3=7.4 0.5x+8=43 3x/5=4.8 30/x+25=85 1.4*8-2x=6 6x-1

Answer 1

7x+5.3=7.4

7x=2.1

x=0.3

0.5x+8=43

0.5x=35

x=70

3x/5=4.8

3x=24

x=8

30/x+25=85

30/x=60

x=0.5

1.4*8-2x=6

11.2-2x=6

2x=5.2

x=2.6

6x-12.8*3=0.06

6x-38.4=0.06

6x=38.46

x=6.41

410-3x=170

3x=240

x=80

3（x+0.5)=21

x+0.5=7

x=6.5