问题 解答题
解方程.
6x+3.6=128x+25=570.8+3.6x=1.52
3
4
x=18
3
5
x=
6
7
7
4
x÷14=
1
2
答案

(1)6x+3.6=12,

6x+3.6-3.6=12-3.6,

6x=8.4,

6x÷6=8.4÷6,

x=1.4;

(2)8x+25=57,

8x+25-25=57-25,

8x=32,

8x÷8=32÷8,

x=4;

(3)0.8+3.6x=1.52,

0.8-0.8+3.6x=1.52-0.8,

3.6x=0.72,

3.6x÷3.6=0.72÷3.6,

x=0.2;

(4)

3
4
x=18,

3
4
3
4
=18÷
3
4

x=18×

4
3

x=24;

(5)

3
5
x=
6
7

3
5
3
5
=
6
7
÷
3
5

x=

6
7
×
5
3

x=

10
7

(6)

7
4
x÷14=
1
2

7
4
x÷14×14=
1
2
×14,

7
4
x=7,

7
4
7
4
=7÷
7
4

x=7×

4
7

x=4.

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