2cos+13cos-7=0

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Solution for 2cos+13cos-7=0 equation:


Simplifying
2cos + 13cos + -7 = 0

Reorder the terms:
-7 + 2cos + 13cos = 0

Combine like terms: 2cos + 13cos = 15cos
-7 + 15cos = 0

Solving
-7 + 15cos = 0

Solving for variable 'c'.

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

Add '7' to each side of the equation.
-7 + 7 + 15cos = 0 + 7

Combine like terms: -7 + 7 = 0
0 + 15cos = 0 + 7
15cos = 0 + 7

Combine like terms: 0 + 7 = 7
15cos = 7

Divide each side by '15os'.
c = 0.4666666667o-1s-1

Simplifying
c = 0.4666666667o-1s-1

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