x-(0.1x+20)=28-0.7x怎么解
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x-(0.1x+20)=28-0.7x怎么解x-(0.1x+20)=28-0.7x怎么解x-(0.1x+20)=28-0.7x怎么解x-(0.1x+20)=28-0.7xx-0.1x-20=28-0.
x-(0.1x+20)=28-0.7x怎么解
x-(0.1x+20)=28-0.7x怎么解
x-(0.1x+20)=28-0.7x怎么解
x-(0.1x+20)=28-0.7x
x-0.1x-20=28-0.7x
0.9x+0.7x=28+20
1.6x=48
x=30
x-(0.1x+20)=28-0.7x
0.9x-20=28-0.7x
1.6x=48
x=30
x-(0.1x+20)=28-0.7x
x-0.1x-20=28-0.7x
x-0.1x+0.7x=28+20
1.6x=48
x=30
移项,整理得1.6x=48,x=30
x-0.1x-20=28-0.7x
0.9x+0.7x=28+20
1.6x=48
x=30
0.9x-20=28-0.7x
1.6x=28+20
x=30
移项,整理得1.6x=48,x=30
x-(0.1x+20)=28-0.7x怎么解
x-(0.1x+20)=28-0.7x解方程
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