If it's not what You are looking for type in the equation solver your own equation and let us solve it.
10f+30=70
We move all terms to the left:
10f+30-(70)=0
We add all the numbers together, and all the variables
10f-40=0
We move all terms containing f to the left, all other terms to the right
10f=40
f=40/10
f=4
| 74+78+x=180 | | x-6.1=3.9 | | m=9·7 | | 173+4+x=180 | | 41=n−22 | | 14y+78=22y-26 | | 93+47+x=180 | | k/3+-13=-11 | | f=82+5 | | X+18=3y+1 | | -3+-p=2 | | D(t)=-200t+9000D | | 101+51+x=180 | | X=-100y=10 | | x÷18=-6 | | 43=15*x | | 2x^2-5x+93=90 | | 25/x-3=32 | | 1.7k=8.5 | | 2/3(n-6)=5n-43= | | 45-6x=-15 | | (5x-2)=(3x+18) | | 1÷33x=12 | | 23-y=77 | | -8=4.6(-12-4z) | | 0.29xx=0.02 | | 21/x+4=1 | | 8b+3b=22 | | q– 3/5= 7 | | -21-8x=19 | | 2x–(3x+5)+2=5x–14= | | 10+5.25h=25+2.50h |