-3(2c)+4(5c)+11=81

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Solution for -3(2c)+4(5c)+11=81 equation:


Simplifying
-3(2c) + 4(5c) + 11 = 81

Remove parenthesis around (2c)
-3 * 2c + 4(5c) + 11 = 81

Multiply -3 * 2
-6c + 4(5c) + 11 = 81

Remove parenthesis around (5c)
-6c + 4 * 5c + 11 = 81

Multiply 4 * 5
-6c + 20c + 11 = 81

Reorder the terms:
11 + -6c + 20c = 81

Combine like terms: -6c + 20c = 14c
11 + 14c = 81

Solving
11 + 14c = 81

Solving for variable 'c'.

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

Add '-11' to each side of the equation.
11 + -11 + 14c = 81 + -11

Combine like terms: 11 + -11 = 0
0 + 14c = 81 + -11
14c = 81 + -11

Combine like terms: 81 + -11 = 70
14c = 70

Divide each side by '14'.
c = 5

Simplifying
c = 5

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