x-(0.5x+5)-[0.5(0.5x+5)-10]-15=10
解方程:X-3/4X=15 X-0.5X=10 3/5X+1/2X=33
2(0.9-x)+4=4.3.(x+1.8)/8=6.6.12x+12=16x.12x-35=5x.X/0.5-10+2
解方程X-0.5X=15 X-0.8X=10 2.5X+2X=9
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
14x+6(11-x)=54 5x+8(15-x)=90 4x-2(10-x)=14 6x-3(15-x)=36 0.5
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
5x-4x=2*1.8,5x-2+3x=3.6,x+4x=20.3,8x+10-3x=30,10.5-0.5x+0.5=
化简|x-5|+|x+10|-|x-15|,
1. x+0.5x=6 4x+16=40 x/5=32% x-4/9x=10/21 x-1/8x=5/8 7x÷2=2.
(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x
11x+0.5=15x-0.7 5x+12=8x+3
x/2- 2-x/5≥-6 0.25(3-2x)>0.5x+10