[75%x- (x-90)]×10=[(x-70)-(x-90)]×15

x+2x+（x+10）=90,x=? [75%x- (x-90)]×10=[(x-70)-(x-90)]×15 x-?x+110=75%x-10 怎样计算 x-?x+110=75%x-10 怎样计算 10x²+530x=75,x等于几? 90/(x/10)*x/6+90=x怎么解 1.5x+20=14x-612.2x-2=10x-663.9+12X = 119+X4.3x+12=75-6x5.76-4x=7x+216.-32 - 5x=13-10x7.152-4x= 6x+228.2x+10 = -90-8x9.-151-9x=10x+2010.10-9x= 135-44x11.250-7x=38x+15 解方程：x+25%x=10 x-75%x=2.5 128%x-x=2.8 X-75%X=10 (解方程) x-10=90%x怎么解 30+20x=90-10x (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 （X+X)+(X-X)+(X*X)+(X/X)=100 (x+7/x+6) +(x+9/x+8)=9x=(x+10/x+9) +(x+6/x+5) 解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1 X+X+X+(X-1)+(X-2)+(X-3)+(X-4)=10(X-3)+(X-4) x-2=(104-x)+2 6x-59=10x-75 (x+10)+(x-15)=280-x4（x-62)=x-38 60x-40=(60+20)*(x-5) 32x+32*0.5-25x+64x=24x+496-49x x+15=3*(109-x ) 5(3x-1.4)=2(6x-0.5) 3(x+0.9)=5(x-1.7) 13x-4(2x+5)=17(x-2)-4(2x-1) (13x+8)/3=5x-1x-60=2[(3561-x)+100]+1 (x+9)+12=2[(x-9)-1 六题解方程：x+75%x=140 x-40%x=96 x-76%x=36 4x+50%x=90 60%x-30=120 x+50%x=45