Question

一，解方程

5x+7=42 x÷4.2=2 3.6x-x=3.25 2（x-3）=5.8

x÷1.44=0.4 3.85+1.5x=6.1 6x-0.9=4.5

Answer 1

5x+7=42 x÷4.2=2 3.6x-x=3.25 2（x-3）=5.8
5x=42-7 x=4.2*2 2.5x=3.25 x-3=2.9
5x=35 x=8.4 x=1.3 x=5.9
x=7

x÷1.44=0.4 3.85+1.5x=6.1 6x-0.9=4.5
x=0.576 1.5x=6.1-3.85 6x=4.5+0.9
1.5x=2.25 6x=5.4
x=1.5 x=0.9

Answer 2

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

Answer 3

1.5X+7=42 X除4.2=2
解：5X+7-7=42-7 解 X÷4.2×4.2= 4.2
5X=35 ×2
X=8.4
X=7 我先回答这些

Answer 4

小学解方程

Answer 5

1.x=7 2.x=8.4 3.x=1.25 4.x=5.9 5.x=0.566 6.x=1.57. x=0.9