解方程:①3.85+1.5x=
解方程:①3.85+1.5x=6.1②x÷1.44=0.4③2(x+5)=13.6④x-0.36x=16....
解方程:①3.85+1.5x=6.1 ②x÷1.44=0.4 ③2(x+5)=13.6 ④x-0.36x=16.
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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.
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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