神马作文网0.5x+30=15.5x 3.2x-12.6=1.2x
1、0.5x+30=15.5x 2、3.2x-12.6=1.2x
（X+X)+(X-X)+(X*X)+(X/X)=100
x+0.5x=30
4X+0.5X=13.5X
x+x=x+15
3.2+x=4.6 x-2.08=5.76 1.2x=0.84 3x+0.5x=4.2 4x-2.16=1.2 x-0.
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
x-30%x=14x+25%x=20
X/(x-30)=(x+40)/X解方程,
(25/X)X(30/X)= 15/X怎么算
x-60%x-25%x=25%x-30
x^2=(x+30)X(x-18)怎么解