x÷0.756=90

x÷0.756=90 x÷0.756=90的解 180-X÷90-X=3 15÷X=(X+90)×18 (x+x)+(x-x)+(x*x)+(x÷x)=81 x/0.756=90 9x-40=2 x/0.756=90解方程 X÷48%=X+(X+32) x*x-x=90怎么解 90-x=2x(18+x) 化简 [3x/(x+2)-x/(x=2)]÷x/(x^2-4)化简 [3x/(x+2)-x/(x-2)]÷x/(x^2-4 90×(x-0.5)=60×(x+0.5) 90x-45=60x+30 90x-60x=30+45 30x=75 x=75÷30 x=2.5 中的45和30是怎么得来的?90×(x-0.5)=60×(x+0.5)90x-45=60x+3090x-60x=30+4530x=75x=75÷30x=2.5中的45和30是怎么得来的? 设f(x)=x+2÷x(x x+2x+（x+10）=90,x=? 80X-90X=6x+80X 解是几 90-x=50+x x-70%x=90 x-25%x=90 X(X-1)=90