问题
解答题
解方程.(温馨提醒:注意书写格式哦!)
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答案
(1)X:2=5:0.4,
0.4x=2×5,
0.4x=10,
0.4x÷0.4=10÷0.4,
x=25;
(2)15.3-3X=0.3,
15.3-3X+3x=0.3+3x,
15.3-0.3=0.3+3x-0.3,
15÷3=3x÷3,
x=5;
(3)
x-5 6
x=0.7+2.3,3 4
x=3,1 12
x÷1 12
=3÷1 12
,1 12
x=36.