If it's not what You are looking for type in the equation solver your own equation and let us solve it.
31f+17=854
We move all terms to the left:
31f+17-(854)=0
We add all the numbers together, and all the variables
31f-837=0
We move all terms containing f to the left, all other terms to the right
31f=837
f=837/31
f=27
| 3z^2-36=12 | | 6=-6x+-12 | | 12+p=4+2p | | -2/5=-5/4+c | | 100=1/x | | -6(6x+3)=-36x-18 | | (x-17)^2+(Y-19)^2=49 | | 1.15x3.2=-3.68 | | 100=1-11/2×n | | |x/7|=3 | | -2+2x=-4-4x | | 7r+3=94 | | -(5a-6)=2(3a+8) | | -8=-2/5x | | w/2+8=22 | | 5=14-4x | | 1+2x=-4-4x | | 25x^2+144x+196=0 | | 31e-5=2e+5 | | 5j-40=35 | | 1/2x+18=4x-6 | | 31e5=2e+5 | | 1/2x×18=4x-6 | | X*1/7-5=b | | 2x+3x-10=35 | | 23m+28=42+16m | | X/7-5=c | | 1/4n=-3/4n-5 | | 3x+2(18-4x)=21 | | 3x-78(x+1)=0 | | 10x+12=1/3(3x-15) | | 3q+6=6q+12 |