If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-10f-9=-7f
We move all terms to the left:
-10f-9-(-7f)=0
We get rid of parentheses
-10f+7f-9=0
We add all the numbers together, and all the variables
-3f-9=0
We move all terms containing f to the left, all other terms to the right
-3f=9
f=9/-3
f=-3
| -20=-8x+4(x-8) | | 3x+5-7=22 | | 3/4k+5=2k-1/4 | | 8(-5n+3)+5n=-116 | | -17m-19-m=19+m | | w-10=-w | | x^2+16x-2=11 | | 3x+8-x=7 | | -2(b-3)-4=33 | | 2x-23+9x-5=39 | | x^2+16x-2=11x2+16x−2=11 | | -16+20s=20+16s | | (2x-4+2x-3)-2=23 | | 1200x+30=870 | | 500+8x=650+4x | | 7x11=15+5x | | -6(-2-4b)=84 | | w−10=–w | | -4x+2x-7=-x+14+2x-54/(9) | | 21x=100 | | 3t=-5 | | 4.3p−32.24=127.92 | | 6(x−5)+26=5x−6 | | 3x+28=8x-13 | | a+16=4a-5 | | 4(x+1)+x=5(x+1)+9 | | 4-3x+6=20-5x | | -3x+8=2x–7 | | 3a+7=(2a-5 | | 7(n+5)+4=88 | | 5x+128+2x+31=180 | | 2(6b-6)=3(4b+4) |