If it's not what You are looking for type in the equation solver your own equation and let us solve it.
f in (-oo:+oo)
f/4 = 9 // - 9
f/4-9 = 0
1/4*f-9 = 0 // + 9
1/4*f = 9 // : 1/4
f = 9/1/4
f = 36
f = 36
| 2/3x=5 | | y/2=4.3 | | 2(g+3)=8+6 | | 2(6x-4)=-44 | | 5(3+h)=4(h-2) | | -10x+240=0 | | 7x1/3 | | 10+4=94 | | (6x-3)(2x+1)=12 | | 3(2x-1)(1x+1)=12 | | z^2+2z=3 | | 4/9=y-2/5 | | (n-7)*9=18 | | 2.1/b=-0.7 | | -(9x-6y-8z)= | | 9x-11=-2 | | 3r+5-2=13 | | 1.2z+3.6=-0.8+4.4 | | 5(3x+4)=5 | | X/2/9=6 | | (X+7)5= | | 8/7-6/p=3p-2/7p | | 1/4y+1/2=-3/4 | | X+0.3=4/5 | | 8x-5=-13 | | -4x=256 | | (x+4/9)=2x | | 2x-10=-4whatisy | | 7x+3+2x-x+4= | | -140=-3x-17 | | 5/7+7m/5=81/35 | | y^2=x+81 |