If it's not what You are looking for type in the equation solver your own equation and let us solve it.
12c-7=10c+21
We move all terms to the left:
12c-7-(10c+21)=0
We get rid of parentheses
12c-10c-21-7=0
We add all the numbers together, and all the variables
2c-28=0
We move all terms containing c to the left, all other terms to the right
2c=28
c=28/2
c=14
| 7x-20=3x-32 | | 9(x+6)+7=9x+2 | | x+12=48x | | (1-3x)/12=(2x-3)/5-(7-5x)/9. | | 12c–7=10c+21 | | d(4)=8 | | 2t+2+2t-3t=1+6 | | 1/4(12x+16)=8x-16 | | 2/3(108)=x | | 5x+7x=16x | | 8x+81=20x+9 | | 2x-3=(4x=9) | | 2x+168=158 | | 3.5x-2=2.5x-2 | | -2=1/6a | | 120=60x | | 2x+186=170 | | -21=j(-7) | | -0.7p-0.1p=-2.8 | | 475=8(x)+(3x) | | (-3-3x)+4=-5 | | (x/5)=1 | | 465=8(x)+(3x) | | (-3-3x)+4=5 | | 4x+6=12x-3 | | 7-m=m-4+3 | | 300=8(x)+(3x) | | 13y-6=-21 | | 9=m+10 | | 5(x)=2x2+9 | | 900=8(x)+(3x) | | -8y+7=9y+8 |