问题 解答题
解方程:
①3.85+1.5x=6.1

②x÷1.44=0.4

③2(x+5)=13.6

④x-0.36x=16.
答案

①3.85+1.5x=6.1,

3.85+1.5x-3.85=6.1-3.85,

1.5x=2.25,

1.5x÷1.5=2.25÷1.5,

x=1.5;

②x÷1.44=0.4,

x÷1.44×1.44=0.4×1.44,

x=0.576;

③2(x+5)=13.6,

2(x+5)÷2=13.6÷2,

x+5=6.8,

x+5-5=6.8-5,

x=1.8;

④x-0.36x=16,

0.64x=16,

0.64x÷0.64=16÷0.64,

x=25.

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