3=[c+6]

Solution for 3=[c+6] equation:

Simplifying
3 = [c + 6]

Reorder the terms:
3 = [6 + c]

Remove brackets around [6 + c]
3 = 6 + c

Solving
3 = 6 + c

Solving for variable 'c'.

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

Add '-1c' to each side of the equation.
3 + -1c = 6 + c + -1c

Combine like terms: c + -1c = 0
3 + -1c = 6 + 0
3 + -1c = 6

Add '-3' to each side of the equation.
3 + -3 + -1c = 6 + -3

Combine like terms: 3 + -3 = 0
0 + -1c = 6 + -3
-1c = 6 + -3

Combine like terms: 6 + -3 = 3
-1c = 3

Divide each side by '-1'.
c = -3

Simplifying
c = -3