Question

解方程：x-0.72x=33.6 7x-6.2×0.3=0.94 1.6（5+x）=9.6

Answer 1

x-0.72x=33.6

0.28x=33.6

x=33.6/0.28

x=120

7x-6.2×0.3=0.94

7x-1.86=0.94

7x=1.86+0.94

7x=2.8

x=2.8/7

x=0.4

1.6（5+x）=9.6

5+x=9.6/1.6

5+x=6

x=6-5

x=1