Question

解方程 2.2x-0.86=2 7.2x=0.44=17 4×9-0.5x=31.5

Answer 1

2.2x-0.86=2

2.2x=2.86

x=1.3

7.2x+0.44=17

7.2x=16.56

x=2.3

4×9-0.5x=31.5

0.5x=36-31.5

0.5x=4.5

x=9