x/15+10/60=x/12-5/60
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
解方程 40%x+2=12 x+25%x=10 x-30%x=1.4 15x-60=240 x+1
x/(x/12+x/15)*(x/12-x/15)=60
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x
X/15 + X/12 + X/10 = 1365,求X,
这些解方程:x-6=15%x12 x-10%x=18 40%x+1/5x=15 25%x-5=60%x 5 3x+20%
30X-2X=84 5.8X-X=60 6.6X-5X=8 4X-X=24 1.5X-X=1
15X÷2=60 4X+X=3.15 3.4X+1.8=8.6 5X-X=2.4 1.5X-X=1 6.6X-6X=1.
2x-12x-4+3=9-9x解方程4x-60=10x-60
10*20%+5%*2x=10%*(x+2x+10) 12%x+(30-x)*14%=4 60*2*(1+25%)÷(2
解方程:1、1.4×(2500%-x)-60%x=15 2、9(300-x)-1.8x=2600 3、5x+10(54-