5(x+2.4)=25.
5(x+2.4)=25.
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!)+.
5x-2.4x=5.2
x-x÷5=2.4 急
2.4X-3.5X=5
x-x/5=2.4 (求未知数x) 12÷5%x=8 4x+x=12.5
18%x+32%x=2 x+20%x=2.4 x+5%x=4.2 15%x+35%x=0.2
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
解方程3x=x+4,2.6x-8=2.4x,4x+12=10x+3 ,7x=12-×,2.5x=2x+4,5x+3=6x
5x+3.2x=32.8. 7.9x2-1.5x=5.3. 5x+2.4×1
3(x-7)+5(x-4)=15 2.4x-3(20-x)=-4
2、解方程.9X-5X=21.6 2.4X+4X=12.8