x-(4x-7)=47
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x-(4x-7)=47x-(4x-7)=47x-(4x-7)=47x-4x+7=47-3x=40x=-40/3原方程=26x=54x=27/13=2.076x-(4x-7)=47先将括号去掉得x-4x
x-(4x-7)=47
x-(4x-7)=47
x-(4x-7)=47
x-4x+7=47
-3x=40
x=-40/3
原方程=26x=54
x=27/13=2.076
x-(4x-7)=47
先将括号去掉得
x-4x+7=47
然后移项得
x-4x=47-7
最后解方程得
-3x=40
x=负3分之40
猪脑
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
2x+3x+4x+5x+x+6x+7x=100
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=?
x-(4x-7)=47
x+7x-4x=多少?
x+7x-4x=?
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