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-f+1=0
We add all the numbers together, and all the variables
-1f+1=0
We move all terms containing f to the left, all other terms to the right
-f=-1
f=-1/-1
f=1
| 1=-z+2/3 | | h-59=232 | | x^2+1x-572=0 | | h-59=233 | | -62-b=71 | | d+9/5=4 | | 13x=10x+19 | | m+86=-12 | | z+3z=48 | | −2(x+0.5)=−2.5(x−1) | | 2x^2+2x-1144=0 | | 15+10r=45 | | -9x+14=23 | | x^2+x-572=0 | | y/6y+9=69 | | -n+4.2-6n+2.8=21 | | 102-r=416 | | 8+a/2=8 | | -15+v=54 | | 34-x=75 | | -5(n-11)=60 | | s-(-6)=48 | | p-38=12 | | F(-3)=x^2-3x+9 | | 61+x=71 | | 59=6+2y | | z-84=19 | | 2y+6=59 | | k-21=69 | | 91=3x-1 | | 4.25x+7=56.75 | | 48-b=100 |