If it's not what You are looking for type in the equation solver your own equation and let us solve it.
7-c=-13
We move all terms to the left:
7-c-(-13)=0
We add all the numbers together, and all the variables
-1c+20=0
We move all terms containing c to the left, all other terms to the right
-c=-20
c=-20/-1
c=+20
| -6=5x-22÷(-3) | | 2x+18+3x+6=9x-16 | | 9x-103=37+4x | | 13-u=278 | | 9x-100=37+4x | | R-81=-r-5 | | x+17+8x-13+3x+8=180 | | 60+x=96 | | 0.17/x=4 | | (7x+8)=(10x+2) | | 7x-100=11x+28 | | 39=8.1+2w | | 2x+4/2=×+2 | | 8m+3=3(m+2)+5m | | 2(k+1)=3k-k+2 | | 30m=60 | | 3x-16+3x+15=8x-17 | | 4x+-8=2x+2 | | -5(3d+5)=20 | | 6x-31=8x-17 | | 2x-5+2x=-53 | | 3=6x=-7+x | | (y+10)+(2y-40)=360 | | 12(3)+3y=60 | | -w+6=w+66 | | d+47=-d+3 | | c-7.6=4c= | | 5x+10=58-x | | 234=18b | | -2=-6x+7x-3 | | 4X+4´=2x+2 | | 2x+12-3=5+8X |