If it's not what You are looking for type in the equation solver your own equation and let us solve it.
9(5+c)=81
We move all terms to the left:
9(5+c)-(81)=0
We add all the numbers together, and all the variables
9(c+5)-81=0
We multiply parentheses
9c+45-81=0
We add all the numbers together, and all the variables
9c-36=0
We move all terms containing c to the left, all other terms to the right
9c=36
c=36/9
c=4
| 37=x+53 | | 9/10m=-12/5 | | 380/1710=532/c | | −4.5=1.5–x | | 7/3x-12=2x-20/3 | | 5y-48=117 | | 9(-5+c)=81 | | 6s•3=198 | | Y=x^2+25x-30 | | 100/2/5=x | | 20-4c= | | 9m=-12105 | | x+(-14)=-28 | | 3.36=6u+30 | | 190=45g+10 | | a=(1/2)*4*(12^1+8^2) | | (n+4/8)=-2 | | 5x–8=2x+4 | | 5t-4=9×4 | | 1. -3(8x);x=1/4 | | 5x-2=4x–9 | | -8-7x-4=16 | | 7f-1=28+6 | | 10x=6x–20 | | x=-80/24 | | g/2+5=11 | | 6.1n=84.84+1.9n | | ⅓-x/3=-11/3 | | 9x=63;x | | f/2+1=11 | | 2n+–5=–17 | | 5x-2x+11=17 |