问题 解答题
(1)4Χ+2(Χ-4)=22(2)
Χ-1
12
=56
(3)(Χ+3)×2-6=8(4)0.36×5-
3
4
Χ
=
3
5
答案

①4x+2(x-4)=22,

4x+2x-8=22,

6x=30,

x=5;

Χ-1
12
=56,

Χ-1
12
×12=56×12,

x-1=672,

x-1+1=672+1,

x=673;

③(x+3)×2-6=8,

2x+6-6=8,

2x=8,

x=4;

④0.36×5-

3
4
Χ=
3
5

1.8-

3
4
x=
3
5

1.8-

3
4
x+
3
4
x=
3
5
+
3
4
x,

1.8=

3
5
+
3
4
x,

3
5
+
3
4
x-
3
5
=1.8-
3
5

3
4
x=1.2,

3
4
3
4
=1.2÷
3
4

x=1.6.

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