Question

一,解方程5x+7=42 x÷4.2=2 3.6x-x=3.25 2（x-3）=5.8x÷1.44=0.4 3.85+1

Answer 1

1.5x+7=42

x=7

2.x÷4.2=2

x=8.4

3.3.6x-x=3.25

2.6x=3.25

x=5/4

4.2（x-3）=5.8

2x-6=5.8

x=5.9

5.x÷1.44=0.4

x=0.576

6.3.85+1.5x=6.1

x=1.5

7.6x-0.9=4.5

x=0.9