x+12.5=3.5x
x+12.5=3.5x
(X+X)+(X-X)+(X*X)+(X/X)=100
x+x=x+15
求x 的值.x +3.5x =9.9;4.25x -x =4.55;10x -2.7x =58.4;6.8x +3.2x
(x+3)(x-4)-x(x-2),化简求值,其中x=12.5
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!)+.
求未知数X. 22.5-0.4X=12.5 X:3.5=4:213
3.5x-1.5x=3.5-x 解方程
2x+{3X(12.5-x)}=30
3.5X+4.7X=24.6求X等于
x-3.5x+5=80%x怎么解
3.5x-14.5-3.5=x