5(x-7.5)=2.5x
5(x-7.5)=2.5x
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!)+.
8x+5x=?3x-2x=?7.5-4.2x=?
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
7.5x-x+5=17.6x=几
【1】2x+2.5x+1.5x=5
5x+x-2.5x=56解方程,
7.5x+30=2.5x+100
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
求x的值 2.5:x=7.5:0.5 x= 2.4x+28.8=48 x= x-3分之2x=1.8 x= (1+5分之3
3X+2.5=5X-12.5
5X+2.5X=15