84=15+c

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Solution for 84=15+c equation:


Simplifying
84 = 15 + c

Solving
84 = 15 + 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.
84 + -1c = 15 + c + -1c

Combine like terms: c + -1c = 0
84 + -1c = 15 + 0
84 + -1c = 15

Add '-84' to each side of the equation.
84 + -84 + -1c = 15 + -84

Combine like terms: 84 + -84 = 0
0 + -1c = 15 + -84
-1c = 15 + -84

Combine like terms: 15 + -84 = -69
-1c = -69

Divide each side by '-1'.
c = 69

Simplifying
c = 69

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