30%X-30%X-[(X-30%X)×20%-2]-30%X=28怎么解
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(x+30)*(x-18)=x*x
30/x=30/(x-1.5)-x
x-30-0.2x=0.5x
3X+30+X+X-15=?
0.8x=x-30 x=
x+35=(x+3x)*30%
60x(x-4)=30x
80%x+30-x=10%x
x ( x-30)= -67.5 X=?
X-30%X+8-X=20
30%x=50%x-20x
x-(30-x)=(30-x)-x/3,怎么解
x-30%x=(280-x)+30%x
X×X-(X-10)(X-10)=30×30
x^2=(x+30)X(x-18)怎么解
(25/X)X(30/X)= 15/X怎么算
X/(x-30)=(x+40)/X解方程,
50%x+x=20 x+30%x=52