100=80+4c

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Solution for 100=80+4c equation:


Simplifying
100 = 80 + 4c

Solving
100 = 80 + 4c

Solving for variable 'c'.

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

Add '-4c' to each side of the equation.
100 + -4c = 80 + 4c + -4c

Combine like terms: 4c + -4c = 0
100 + -4c = 80 + 0
100 + -4c = 80

Add '-100' to each side of the equation.
100 + -100 + -4c = 80 + -100

Combine like terms: 100 + -100 = 0
0 + -4c = 80 + -100
-4c = 80 + -100

Combine like terms: 80 + -100 = -20
-4c = -20

Divide each side by '-4'.
c = 5

Simplifying
c = 5

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