15+c=21

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Solution for 15+c=21 equation: 


Simplifying
15 + c = 21

Solving
15 + c = 21

Solving for variable 'c'.

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

Add '-15' to each side of the equation.
15 + -15 + c = 21 + -15

Combine like terms: 15 + -15 = 0
0 + c = 21 + -15
c = 21 + -15

Combine like terms: 21 + -15 = 6
c = 6

Simplifying
c = 6

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