Question

解方程:1.6*0.7-0.12x=1 2.3x+7.7x-5=2.8

Answer 1

1.6*0.7-0.12x=1

1.12-0.12x=1

0.12x=1.12-1

0.12x=0.12

x=1

2.3x+7.7x-5=2.8

10x-5=2.8

10x=2.8+5

10x=7.8

x=7.8/10

x=0.78