C+6=((21+c)+6)*5

Solution for C+6=((21+c)+6)*5 equation:

Simplifying
C + 6 = ((21 + c) + 6) * 5

Reorder the terms:
6 + C = ((21 + c) + 6) * 5

Remove parenthesis around (21 + c)
6 + C = (21 + c + 6) * 5

Reorder the terms:
6 + C = (21 + 6 + c) * 5

Combine like terms: 21 + 6 = 27
6 + C = (27 + c) * 5

Reorder the terms for easier multiplication:
6 + C = 5(27 + c)
6 + C = (27 * 5 + c * 5)
6 + C = (135 + 5c)

Solving
6 + C = 135 + 5c

Solving for variable 'C'.

Move all terms containing C to the left, all other terms to the right.

Add '-6' to each side of the equation.
6 + -6 + C = 135 + -6 + 5c

Combine like terms: 6 + -6 = 0
0 + C = 135 + -6 + 5c
C = 135 + -6 + 5c

Combine like terms: 135 + -6 = 129
C = 129 + 5c

Simplifying
C = 129 + 5c