5x+12=6x-4
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
2x+3x+4x+5x+x+6x+7x=100
5x+9x=6x*2+12 x+9-x/3=4
x=x/6+x/12+x/7+5+x/2+4=?
x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=?
x^3×x^5×x+(x^3)^12+4(x^6)^2=?
1/6x+1/12x+1/7x+5+1/2x+4=x
5x+12=6x-4
x-(1/5+1/5)x-39=39 x-1/4x-2/5x=112 x-1/6x-1/3x-12=20
15x=23x-24 12+5x=3x-8 3(x-3)=9-(x+6)解 4+x=4x-17解
x-1=3x+3 x-3=12-4x 6x-14=5x-10 x+1=2-4x