问题 解答题
巧解方程.
10×7-5X=7      
2
3
5
6
=X:9.
答案

(1)10×7-5x=7,

70-5x=7,

70-5x+5x=7+5x,

7+5x=70,

7+5x-7=70-7,

5x÷5=63÷5,

x=12.6;

(2)

2
3
5
6
=x:9,

5
6
x=
2
3
×9,

5
6
6
5
=6×
6
5

x=7

1
5

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