2.5c-21=40

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Solution for 2.5c-21=40 equation: 


Simplifying
2.5c + -21 = 40

Reorder the terms:
-21 + 2.5c = 40

Solving
-21 + 2.5c = 40

Solving for variable 'c'.

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

Add '21' to each side of the equation.
-21 + 21 + 2.5c = 40 + 21

Combine like terms: -21 + 21 = 0
0 + 2.5c = 40 + 21
2.5c = 40 + 21

Combine like terms: 40 + 21 = 61
2.5c = 61

Divide each side by '2.5'.
c = 24.4

Simplifying
c = 24.4

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