If it's not what You are looking for type in the equation solver your own equation and let us solve it.
15+6f=7f
We move all terms to the left:
15+6f-(7f)=0
We add all the numbers together, and all the variables
-1f+15=0
We move all terms containing f to the left, all other terms to the right
-f=-15
f=-15/-1
f=+15
| 10x-6=134 | | 1+9x=-62 | | 17x+8=-2+19x | | n+1=2n-5 | | x2+x=380 | | -8v+5(v-2)=-34 | | 14x+12=10x | | -2+3(v-2)=-36-v | | 4(1-2p)+5=0 | | 6x-15=12x+12 | | 8=3n-5n | | 1-2/3x=0.7-1/3x | | 2(-4-7x)=-8x+40 | | 3(2x+5)=-28+1 | | 3–2(x–4)=-5x+10 | | 1/8s=1 | | 2-2/3x=0.7-1/3x | | 3–2(x–4)=-5+10 | | 7n-8=5n-6n | | 484.48=210+0.94x | | 3x^2+8x-144=0 | | 2x•2x+30=3x | | 2x+x+3/7=2 | | M=5m-4 | | 3-6(2x+6)=-5 | | -25x+100=-55x+550 | | -9m–1=-9m–10 | | 1-066x=0.7-0.33x | | 484.48=210x+0.94 | | -6(2x+1)+(13x-7=0 | | -2s=-2s+6 | | (P-2q)3=(4)3 |