6.4x=4.4x+12.4

6.4x=4.4x+12.4 2x+3.6*2=12.4 3(x+3.6)=18.6 x+3.5x=13.5 27x-4x=34.5 3x+2.8=4.3 12x-24=6 3x+9=10.5 5x+1.2=4.7 3*1.5+2x=11.55.4+1.8x=6.3 4.4x-2.7x=5.78 2.5x-3.6=6.4 2x+3.6*2=12.4 3(x+3.6)=18.6 x+3.5x=13.5 （X+X)+(X-X)+(X*X)+(X/X)=100 x*x*x*x*x=80000? {x-13.5}+{x-12.4}+{x-9.8}+{x-8.3}+{x-6}=3x 8x-4.8x=1.6x-40％x=247.6x+4.4x=156 已知x+x^2+x^3+x^4+x^5+x^6=4.4,求x 请解题, x*x*x=504 x*x*x=504 （x+x）+(x-x)+(x/x)=11.2 x+x+x+y+y=6.4 y+y+y+x+x=7.1 怎么算? f(x)=x,x x+x=x+15 X(X-1)=X 180=( )x( )x( )x( ) ×( ) (x+30)*(x-18)=x*x x+ x+(x*50%)=1.5X? f(x)=x^2+x (x 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!)+.