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)
(9*x)/2 = 81 // - 81
(9*x)/2-81 = 0
9/2*x-81 = 0 // + 81
9/2*x = 81 // : 9/2
x = 81/9/2
x = 18
x = 18
| n+(3n+4)+(4n-9)=67 | | 2=m/7-7 | | 5x-21-10x-10=34 | | Y=8ab | | 97=f-266 | | 24-8y=9 | | 4r+9=-7 | | 100-1/2*9.8*3^2 | | 0=-16t^2+117t+5 | | 16a^2+9=45 | | -10+3x-15+x=7 | | -5x-8x=-8-4x-8x+14 | | 6b+6=-27+32b | | M+429=971 | | tan(x)=0.009 | | -28v+11=-12 | | 17.2v=16.9v-3.45 | | X-.80=16 | | -2/3x*6==1 | | 5x-8-4x=3 | | 2r-2=-2+7r | | R=3(11) | | 1=2/5(4) | | 3-4(3x-1)=15-4x | | 6-5x-3x=12 | | 3x+10y=9 | | -6b-12=b-7-2b | | x^2-4y^2=12 | | 7tan(36)=x | | 6-1.5w=-1.5w+8 | | 3+4(3x-1)=15-4x | | T-5d=3 |