问题
解答题
解方程.
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答案
(1)5.4x=37.8,
5.4x÷5.4=37.8÷5.4,
x=7;
(2)x÷1.5=10,
x÷1.5×1.5=10×1.5,
x=15;
(3)0.4x+0.6×2.5=2.7,
0.4x+1.5=2.7,
0.4x+1.5-1.5=2.7-1.5,
0.4x=1.2,
0.4x÷0.4=1.2÷0.4,
x=3.
解方程.
|
(1)5.4x=37.8,
5.4x÷5.4=37.8÷5.4,
x=7;
(2)x÷1.5=10,
x÷1.5×1.5=10×1.5,
x=15;
(3)0.4x+0.6×2.5=2.7,
0.4x+1.5=2.7,
0.4x+1.5-1.5=2.7-1.5,
0.4x=1.2,
0.4x÷0.4=1.2÷0.4,
x=3.