4.5 x + x=22

4.5 x + x=22 matlab中a=[x(11)/x,x(12)/x;x(21)/x,x(22)/x;x(31)/x,x(32)/x;x(41)/x,x(42)/x;x(51)/x,x(52)/x]咋错了 （X+X)+(X-X)+(X*X)+(X/X)=100 9x+7x-x=4.5 20%x+20%x×30%x-20%x=4.5 6.5x-4.5x=93.6-6.5x-3.5x 4.5x+x=12 x+4.5x=0. 4.5X-X=3.5 x+24=4.5X 4.5x-x=10.5 x*x*x*x*x=80000? x-0.8x=22 x-0.8x=22 x-4x=102 x-0.8x=22 x-4x=102x-0.8x=22 (4x+2)/x+(4x-22)/(x-5)=(x-6)/(x-4)+(7x+9)/(x+1) 证明(x+1)(X+3)(x+5)(x+7)+15=(X+8x)+22(x+8x)+120 x/x^2+x+1=-1/22x^2/(x^2-x+1)+x-1/x^3-1