x +140＝6x +20
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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)
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||