If it's not what You are looking for type in the equation solver your own equation and let us solve it.
20f=40
We move all terms to the left:
20f-(40)=0
We move all terms containing f to the left, all other terms to the right
20f=40
f=40/20
f=2
| 5c-3=33 | | 6a+15=3(2a+5) | | y/2=50 | | -2x²=8x | | -13=v/6 | | 3x²+9=0 | | -10=y-7 | | 10^3x=99 | | x−x3=x+12 | | 3000=3607.5*30/(8.5-x) | | x2−18x+56=0 | | 9x−6x+9=0 | | a/13+164=5a+12 | | 3000=3607.5*30/8.5-x | | a/13+164=5a+112 | | 4(x+6)-3(2x-1)=5x-8 | | 3/1/7d=33/14 | | 3/7d=33/14 | | 4(x+2)=(2x)2+8x | | (8.8÷5.5)+2.1=m | | 3b+4=9b+2 | | 9x=3*(3x-7) | | 6x-2=2- | | -2x2+16x-32=0 | | −100⋅2^(0.5y)=−5 | | y+12.8=61.7 | | 2(x+7)-15=8x | | 3x5=-12 | | (3x-9)(5x+25)=0 | | 3d-4=d+6 | | 4+x×7=95 | | 4+x×7=55 |