Question

数学题：解方程

2.4+0.5x=3.8
3.6x-x=3.12
4（a-22.5）=5.8

Answer 1

2.4+0.5x=3.8
0.5x=3.8-2.4
0.5x=1.4
x=2.8

3.6x-x=3.12
2.6x=3.12
x=1.2

4（a-22.5）=5.8
4a-90=5.8
4a=5.8+90
4a=95.8
a=23.95

Answer 2

2.4+0.5x=3.8
0.5x=3.8-2.4
0.5x=1.4
x=2.4
3.6x-x=3.12
2.6x=3.12
x=1.2
4(a-22.5)=5.8
a-22.5=1.45
a=1.45+22.5
a=23.95

Answer 3

1. 2.4+0.5x=3.8
0.5X=1.4
X=2.8
2. 3.6x-x=3.12
2.6X=3.12
X=1.2
3. 4（a-22.5）=5.8
4a-90=5.8
4a=95.8
a=23.95

Answer 4

2.4+0.5x=3.8 , 24+5x=38 . 5x=38-24 , x=14/5=2.8
3.6x-x=3.12 ,360x-100x=312 ,250x=312 , x=1.248
4（a-22.5）=5.8 ,4a=5.8+90 , a=23.95

Answer 5

x=2.8
x=1.2
a=23.95

Answer 6