If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
(X^2)/5-(2.5*x) = 0
(X^2)/5-2.5*x = 0
1/5*X^2-2.5*x = 0 // - 1/5*X^2
-2.5*x = -(1/5*X^2) // : -2.5
x = (-(1/5*X^2))/(-2.5)
x = 0.08*X^2
x = 0.08*X^2
| b+4/-3 | | 300=2(w+90)+2w | | x/3+x/5=x/2+11/6 | | 175000.00+550.00x=35000+1680.00x | | K/-3-11-20 | | -4+u=5 | | (y^6/8)^2/3 | | 2-18=x/-5 | | 8=(5x-3)/6 | | 5n(n-3)(n-4)=0 | | 36-2x=7m | | 10x+3=51+8x | | 5z=14-19 | | 13h+91=-18 | | 6x^2+x-(1)=0 | | 3y^2+4y-1=0 | | 1/3(-3x) | | x/3+x/7=20 | | -2=7+k/-4 | | 1/3(-3x)+1/3*4 | | f(x)=-x^4+2x^3+30x^2+46x-492 | | -2=7+k/4 | | 13(h+7)=-18 | | 6w-12w=42 | | x/5-11=10 | | 4/5x+8=10 | | -20+18=m-3 | | 5+x^2-7=-12 | | 7h^2=14 | | 3.14(14^2)-1/2(14/2)(1.73)(42) | | -5+2x=81 | | -4u=15 |