问题
解答题
解方程.
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答案
(1)5x+15=75,
5x+15-15=75-15,
5x=60,
5x÷5=60÷5,
x=12;
(2)x-60%x=4.2,
(1-60%)x=4.2,
0.4x=4.2,
0.4x÷0.4=4.2÷0.4,
x=10.5.
解方程.
|
(1)5x+15=75,
5x+15-15=75-15,
5x=60,
5x÷5=60÷5,
x=12;
(2)x-60%x=4.2,
(1-60%)x=4.2,
0.4x=4.2,
0.4x÷0.4=4.2÷0.4,
x=10.5.