If it's not what You are looking for type in the equation solver your own equation and let us solve it.
5f-20=20
We move all terms to the left:
5f-20-(20)=0
We add all the numbers together, and all the variables
5f-40=0
We move all terms containing f to the left, all other terms to the right
5f=40
f=40/5
f=8
| x/7+7=-6 | | -16x^2+31x+5=19 | | -10s+-50=-46 | | 3+7x=-3x | | -c-6=-2 | | 6+-2x=-8 | | F(x)=x^2+4x-21=0 | | 4n+20=60 | | 5x+2+7x+4=15x-17 | | 10y+22=6y+30 | | 4n+5=60 | | 0=n^2-11n | | 28s+28=224 | | 4l+4=36 | | 3*n+8=23 | | 2x-4=×+1 | | 3*n*8=23 | | 10u-80=100 | | 2q-12=14 | | X=1/11y-5 | | 5x/8=2-3x/8 | | 3⋅(x+7)= | | t6-6=16 | | 2(3w+9)/5=9 | | 4x^2+12x+80=0 | | a6+2=16 | | X•15-21=12x | | 5(f-8)=25 | | 20-4500x^-2=0 | | 15x-38=90 | | 10/9=p/14 | | -2x-10=-6x-34 |