Question

1.15x+7x=662.9x-8x=15.83.7.5x+2.5x=2又2分之14.52x-4x=1205.7.2-x

Answer 1

1.15x+7x=66

22x=66

x=3

2.9x-8x=15.8

x=15.8

3.7.5x+2.5x=2又2分之1

10x=5/2

x=1/4

4.52x-4x=120

48x=120

x=2.5

5.7.2-x=49.6

x=49.6-7.2

x=42.4

6.75+8x=125

8x=125-75

8x=50

x=25/4