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)
3*x-((9/4)*x)-12 = 0
3*x+(-9/4)*x-12 = 0
3/4*x-12 = 0 // + 12
3/4*x = 12 // : 3/4
x = 12/3/4
x = 16
x = 16
| 4x=18-3 | | 3(x+4)(x-6)=0 | | 2/3x+0.6=5/8 | | x/4+8=1 | | -9+x=-28 | | 2/(2/x)+(2/y) | | 6(x-1)+2(3-9x)=-5x-2x | | n+3n-2=7 | | 13w-9w-8=3 | | 4x+28x-6=4 | | K^2-5k+4=0 | | 4(3x-8)=14x-3 | | 14x-25=9x+5 | | 12(x-7)=12(x+7) | | (2x+3)3=27 | | 19*x+7*x*y+19*y=137 | | d/-8+37=-73 | | 7(x-3)=5(x-4) | | (3a+6)(5a+4)= | | 7x*7y+19*x+19*y=137 | | 7(x-2)=5 | | 4x^2+y^2-32x-2y+29=0 | | 2(9+7x)=130 | | 0.3w+4=0.8-0.2w | | 6x=-3x-18 | | 5x-(x+1)=10 | | (m-n)2= | | 7(6+1/3x)=133/3 | | -1/3(x+1)=3 | | 7x+10=7x-10 | | 0.4(x+80)+1.2x=96 | | 6(4x+7)=66 |