8.3x-4.9=5.2x+20.52怎么写

8.3x-4.9=5.2x+20.52怎么写 （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 x*x*x=504 x*x*x=504 （x+x）+(x-x)+(x/x)=11.2 x+3.2x=4.8 16+7x=45 5.2x-x=32.4 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!)+. 18.6x+5.2x=9.52 x=多少 2.4x-1.4x-3x=5.2-8 1.7X+8.3X=0.