2c+.5c=21

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Solution for 2c+.5c=21 equation: 


Simplifying
2c + 0.5c = 21

Combine like terms: 2c + 0.5c = 2.5c
2.5c = 21

Solving
2.5c = 21

Solving for variable 'c'.

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

Divide each side by '2.5'.
c = 8.4

Simplifying
c = 8.4

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