0.5x+20=3*(65-x)
5*(x-2)=4*(x+3) 2x+(50-x)*4=140 3x-(8-x)=20*4 200x=(x-0.5)*2
x-3(20-x)=3x-7(9-x)
4x-3x(20-x)=5x-7x(20-x)
4x-3x(20-x)=5x-7x(20-x)的解法
20+4x=6x-24 3(3x-2)=10-0.5(x-3.5)
(X+4)/0.2-(X-3)/0.5=0.2 x-(x-1)/6=3-(x+2)/3 x/12-(2x-1)/20={
4X减0.5X等于1.75 X除0.63=12 5X加X=20 5X减3X=3.2
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^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
(X-4)(x-2)-2(X-1)(X+3)其中X=-0.5
X+1-3X=5X+10 6-3X=5X-20
(X-X*20%-18-(X-X*20%-18)*10%=X*1/2-3(过程)