2c+8=21

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Solution for 2c+8=21 equation: 


Simplifying
2c + 8 = 21

Reorder the terms:
8 + 2c = 21

Solving
8 + 2c = 21

Solving for variable 'c'.

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

Add '-8' to each side of the equation.
8 + -8 + 2c = 21 + -8

Combine like terms: 8 + -8 = 0
0 + 2c = 21 + -8
2c = 21 + -8

Combine like terms: 21 + -8 = 13
2c = 13

Divide each side by '2'.
c = 6.5

Simplifying
c = 6.5

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