问题 解答题
解方程.
1
2
X+
1
3
X=
3
4

X-12%X=2.816.
答案

(1)

1
2
x+
1
3
x=
3
4

5
6
x=
3
4

5
6
6
5
=
3
4
×
6
5

x=

9
10

(2)x-12%x=2.816,

0.88x=2.816,

0.88x÷0.88=2.816÷0.88,

x=3.2

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