5（x+1.2)-1.5=8x+0.6

30X-2X=84 5.8X-X=60 6.6X-5X=8 4X-X=24 1.5X-X=1 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 解方程:x/4=30% 36/x=3/4 10/x=2.5/0.8 x/4=1.2/5 X/1.2=1.5/0.6 x/ x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=? x+17=3(x+13),2x-11.2=0.6x,2.5x-2.17=21.9-5.8x,8（x-1.5）=x+0.6 1.2(x-2)-3(4x-1)=9(1-x) 2.11x+64-2x=100-9x 3.15-(8-5x)=7x+(4 4X-24=2X+20 2X（X-0.7）=4.8 0.6X+3X2.5=67.5 （X-7）除以3=8 5X-1.5X 1.8-8x/1.2-1.2-3x/2-5x-0.6/0.3=2.9 X-5+8*X=7*X-2*X-1 1,x-1/4x=3/8 2,5/x:1.5/1.2.解方程 y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1