If it's not what You are looking for type in the equation solver your own equation and let us solve it.
U in (-oo:+oo)
U/3 = 12 // - 12
U/3-12 = 0
1/3*U-12 = 0 // + 12
1/3*U = 12 // : 1/3
U = 12/1/3
U = 36
U = 36
| x^2-6x-16/x^2+6x+8 | | (-7u^2+4u-3)+(5u^2+u+6)= | | M/6=8 | | (3t/4) | | (-5v^2+v-3)+(4v^2+6v+2)= | | 32-w=21 | | R-11=20 | | (-5v^2+4-3)+(4v^2+6v+2)= | | P+5=14 | | 19x+9y=300 | | (-2u^2+3u)+(-6u^2-4u+1)= | | N-4=21 | | 4.9090990909= | | 6+p=12 | | y=3/4x-3/2+6/4 | | 6x+2=(x+7)+(x-5) | | 14-x=6 | | y=34/x-3/2+6/4 | | y=7/8x-7/4+20/4 | | 6d-1-3d=55+2d | | 11(x+4)-3x=4(2x+2)-10 | | 30=t-12 | | (4x^2+34x+40)/(x+7) | | 3d+4-(-2d)=5d+33 | | -14x+3(x-4)+7x=5x-12 | | 3d-4+(-2d)=5d+33 | | 2x+2(x-5)=3x-5 | | (3x/4)-(2x/5)=1 | | y-5=7/8x-7/8-2 | | 15x-8x=1 | | -2x-2=20-2 | | 12. 3(4x-1)=21 |