解方程12x-4x=0.96 7x+3X4=40 8x-x=11.9 5x-3.7=8.8

1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程 解方程：x(3x-4)+2x(x+7)=5x(x-7)+90 解方程：（x-8）/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3) 解方程(x-2)/(x-3)-(x-3)/(x-4)=(x-5)/(x-6)-(x-6)/(x-7) 解分式方程 x-7/x-9+x-3/x-5=x-4/x-6+x-6/x-8 解方程 x-7/x-9+x-3/x-5=x-4/x-6+x-6/x-8 解方程 x+2/x+1+x+8/x+7=x+6/x+5+x+4/x+3 解方程 (x+2)/(x+1) - (x+4)/(x+3)=(x+6)/(x+5)-(x+8)/(x+7) 初二分式方程x+3/x+4+x+8/x+9=x+4/x+5+x+7/x+8解(x+3/x+4)+(x+8/x+9)=(x+4/x+5)+(x+7/x+8) 解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3) 解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3) 2x+3x=12-7x 解方程 解方程[3x+4]+x=7[x-5] X-X/12-X/7-X/8-X/4-X/20-X/5-30-120-300=50解方程 解方程(12x-10)/(4x-3)+(32x-34)/(8x-9)=(24x-23)/(8x-7)+(16x-19)/(4x-5) 解方程1/(x+x﹚+1/(x+3x+2﹚+1/(x+5x+6﹚+1/(x+7x+12﹚=4/21得 (x-1)(x-3)(x-4)(x-12)+5x^2=0解方程 7x(x-6)+3x=4x(2x+5)怎么解这个方程