If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-3c+8=-13
We move all terms to the left:
-3c+8-(-13)=0
We add all the numbers together, and all the variables
-3c+21=0
We move all terms containing c to the left, all other terms to the right
-3c=-21
c=-21/-3
c=+7
| u/2-15=6 | | 46=x+6 | | x2-8x=24 | | 3n^2-5=2n | | 9n^2-8=-29 | | 6x+5=29+10x | | 2d–2=2 | | f(-16)=3-(-16=2)^2 | | -390=26c+52 | | -34=v+42=5v | | 2-3(1-x)=x+7x | | -j=5 | | 9(y-2+4=31 | | 10n^2-10=-21n | | 3(4x+5)=-23+14 | | m–2=1 | | 6-4x=59 | | 74+12x=278 | | h-6=-5 | | 6x+11−5x=−9x−15+x | | 1x=(7x+6) | | 8-2d/3=-2 | | b6=9 | | 4(x+-7)=8 | | r=15=4r-6 | | 10r^2-21r+9=0 | | u+-9=-2 | | 6+4x=59 | | 28+x=5 | | 2d/3=-10 | | 4-6n=16 | | Y=9x*11 |