3+0.2x⼀0.2-0.2+0.03x⼀0.01=0.75或分母带小数的方程计算题,怎么做?

(3+0.2x)⼀0.2-(0.2+0.03x)⼀0.01=0.75
2024-12-28 15:22:43
推荐回答(4个)
回答1:

(3+0.2x)/0.2-(0.2+0.03x)/0.01=0.75
两边乘于100
20(3+0.2x)-(0.2+0.03x)=75
60+4x-0.2-0.03x=75
4x-0.03x=75-60+0.2
3.97x=15.2
x=15.2/3.97

x=1520/397

回答2:

(3+0.2x)/0.2 - (0.2+0.03x)/0.01=0.75

(30+2x)/2 - (20+3x)=0.75

(30+2x - 40 - 6x)/2=0.75

-4x - 10 =1.5

4x=11.5

x=23/8

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回答3:

3+0.2x/0.2-0.2+0.03x/0.01=0.75
3+x-0.2+3x=0.75
4x=-2.05;x=-2.05/4=-205/400=-41/80

回答4:

(3+0.2x)/0.2-(0.2+0.03x)/0.01=0.75
解:15+x-20+3x=0.75
4x=5.75
x=23/16