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)
(1/2)*x-6 = 9 // - 9
(1/2)*x-9-6 = 0
1/2*x-15 = 0 // + 15
1/2*x = 15 // : 1/2
x = 15/1/2
x = 30
x = 30
| 65=2.5d+5 | | 14y^3-21y+6-4y= | | 1500=120x+40y | | 36.2484=4*3.14*r^2 | | (3x^2y/2y)^-3 | | 2568.3944=4*3.14*r^2 | | 8a+13=-12.2 | | -5x^2+15=0 | | (r-5)(r+5)+(r-5)(r+8)= | | n/6=2/3 | | x=10n^2-95n+45 | | h(t)=16t^2+96t+160 | | cos(2)x+cos(3x)=0 | | (8-z)(3z-7)=0 | | 5t^2-t-4=0 | | 56=240+8z | | 3/8m=11/6 | | (27×^6)2/3 | | cos(2*x)+cos(3*x)=0 | | 14=4x-8-3x | | 3212=44p+132 | | (3y/6y-12)-(2y/y-2) | | 11736.1519=4/3*3.14*r^3 | | 12.5x=-62.5 | | 9j-6h=-5+1 | | -47x+10x=24-48 | | 13y-9y-5=78.12 | | 3m^2-13m=14 | | 12x=-62.5 | | 2c=c+19 | | n/4=11/3 | | 2c=13+c |