问题
解答题
解方程
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答案
(1)1.6x+2.4=7.52,
1.6x+2.4-2.4=7.52-2.4,
1.6x=5.12,
1.6x÷1.6=5.12÷1.6,
x=3.2;
(2)3(x-0.8)=6.3,
3x-2.4=6.3,
3x-2.4+2.4=6.3+2.4,
3x=8.7,
3x÷3=8.7÷3,
x=2.9;
(3)28.4-5x=5.8,
28.4-5x+5x=5.8+5x,
5.8+5x=28.4,
5.8+5x-5.8=28.4-5.8,
5x=22.6,
5x÷5=22.6÷5,
x=4.52.