问题 解答题
解方程.
(1)6x+0.5×7=6.5
(2)
2.5
x
=7.5:12.
答案

(1)6x+0.5×7=6.5

6x+3.5=6.5

6x+3.5-3.5=6.5-3.5

6x=3

6x÷6=3÷6

x=0.5;

(2)

2.5
x
=7.5:12

7.5x=2.5×12

7.5x÷7.5=30÷7.5

x=4.

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