X+2X+(180-3X)=180 怎么算?
X+180=3X怎么算
x x-20=180怎么算
x+x+x分之180=42怎么算
X-40%X+1200=2/3X怎么算
3x+2.5(68-x)=180,3x+2(68-x)=180,2.5x+2.5(68-x)=180,这三道方程怎么解
20%x+80%(x-180)=32%(x+x-180)怎么算
(2x+1)²-(x+3)(3-x)=6x怎么简便算?
已知3f(x)+2f(x)=x,求f(x)怎么算
(X-3)/(X^2-4)*(X^2-4X+4)/(x^2-x-6)-1/(x+2)怎么算?
7x-3(2/3x+1/5x)-(x+2/5x)+2x,=5x怎么求出
3X+X=16怎么算
X+48=3X怎么算?