x +140＝6x +20
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x+140＝6x+20x+140＝6x+20x+140＝6x+20x+140=6x+20140-20=6x-x120=5xx=24x＝24全部展开收起先移项x-6x=20-140,5x=-120，解得
x +140＝6x +20
x +140＝6x +20
x +140＝6x +20
x+140=6x+20 140-20=6x-x 120=5x x=24
x＝24
收起
先移项x-6x=20-140,5x=-120，解得x=-24
x +140＝6x +20
6x+20-x=2x=140
x+x除以6＝140
(15-x)×6＝(20-x)×5
解方程4X－3(20－X)＝6X-7(11－X)
6x(x-2)＝(x-2)(x-3)
x(x+2)(x+6)+20x+6=0
因式分解(x+1)(x-2)(x-3)(x-6)+20
x/6+x/12+x/20+x/30=1
(2-x)(6-x)(12-x)(20-x)=
x²-x＝20
x+4x＝20
x+0.5x＝6
6-x=20%x
3(x^4)^6-2(x^5×x^3)^3+x^11×x^13+x^20×x^3×x
2x(x-1)-x(3x+2)=(-x-1)(x+6)-20
15X(4X-8)-5X(2X+10)=6X(5X-20)
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