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1.5/8x-22=3/7x2.x/5-6=x/6-23.(1+1/6)x+(7500-x)*(1-1/5)=7100
题目详情
1.5/8x-22=3/7x 2.x/5-6=x/6-2 3.(1+1/6)x+(7500-x)*(1-1/5)=7100
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答案和解析
1.5/8x-22=3/7x
乘以56得
35x-1232=24x
35x-24x=1232
11x=1232
x=112
2.x/5-6=x/6-2
乘以30得
6x-180=5x-60
6x-5x=-80-60
x=120
3.(1+1/6)x+(7500-x)*(1-1/5)=7100
7/6 x+(7500-x)4/5=7100
7/6 x+6000-4/5 x=7100
7/6 x-4/5 x=1100
乘以30得
35x-24x=33000
11x=33000
x=3000
乘以56得
35x-1232=24x
35x-24x=1232
11x=1232
x=112
2.x/5-6=x/6-2
乘以30得
6x-180=5x-60
6x-5x=-80-60
x=120
3.(1+1/6)x+(7500-x)*(1-1/5)=7100
7/6 x+(7500-x)4/5=7100
7/6 x+6000-4/5 x=7100
7/6 x-4/5 x=1100
乘以30得
35x-24x=33000
11x=33000
x=3000
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