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)
65 = (1/2)*x // - (1/2)*x
65-((1/2)*x) = 0
(-1/2)*x+65 = 0
65-1/2*x = 0 // - 65
-1/2*x = -65 // : -1/2
x = -65/(-1/2)
x = 130
x = 130
| 4=-5x-x^2 | | cos^2(pi/2) | | -22x=-60-2x^2 | | 2sin(pi/2) | | 168=80x-8x^2 | | -(1/3)x-(5/4)=-(8/5) | | (x-19)(x-19)=27 | | 324=x^8 | | 8z^3/×2/z | | x+5y-4z=1 | | 36=9x+x^2 | | -(1/3)y-(9/5)=-(3/2) | | sen(5x)=sen(x) | | 3x^3+6x^2-15x= | | 26u^2+-11u+15=0 | | sen(5x)=senx | | 36=(9+X)x | | -(3y/5)=15 | | x/9=9.9 | | 6+n=60 | | -(5/8)y=10 | | 0=12t-2t^2 | | 3x^2-14x-12=-6x-9 | | 4p^8-4=0 | | 3/8r=40 | | 6/7x6/7 | | 9-14/4=-2 | | 6-2=n-6 | | -3.5+-1.5y=0.5+-1.5y | | 648=8x^2 | | -12x-144=-9+-63 | | 49+x^2=36+x^2 |