If it's not what You are looking for type in the equation solver your own equation and let us solve it.
40f=30
We move all terms to the left:
40f-(30)=0
We move all terms containing f to the left, all other terms to the right
40f=30
f=30/40
f=3/4
| 180=40g | | 3(x-5)=2(x+5)x=5 | | 56=36+k | | 5/7+n=-17 | | 3^x=1594323 | | (1927823-y)/y=0.65 | | m+2m-6+-12=2m | | 0=4t(-4t+25) | | 1/3=v+6/7 | | 20=-7x+5(6x-19 | | -5=h/5 | | 4160=65z | | 9m^2+2m-10=0 | | 5(2x1)=29 | | 10=-8x+34 | | 1/4a+1/3a=8=22 | | 2970=9g | | (1990768-y)/y=0.65 | | g9=2970 | | 5(10x6)=50x-4 | | -16t^2-12t+180=0 | | w/(-2)-(-5)=6 | | (4x+5)÷6=12 | | 47-11=h×4 | | -19+x=-7 | | 21000=50p | | x-18=180 | | x2(+1)=−2+5 | | 3x2+4x/2x-9=5 | | -w/4-(-9)=5 | | 72x-432/x^2=0 | | 9^x-2.3^x-15=0 |