9cos(2x)=27cosx-18

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Solution for 9cos(2x)=27cosx-18 equation:


Simplifying
9cos(2x) = 27cosx + -18

Remove parenthesis around (2x)
9cos * 2x = 27cosx + -18

Reorder the terms for easier multiplication:
9 * 2cos * x = 27cosx + -18

Multiply 9 * 2
18cos * x = 27cosx + -18

Multiply cos * x
18cosx = 27cosx + -18

Reorder the terms:
18cosx = -18 + 27cosx

Solving
18cosx = -18 + 27cosx

Solving for variable 'c'.

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

Add '-27cosx' to each side of the equation.
18cosx + -27cosx = -18 + 27cosx + -27cosx

Combine like terms: 18cosx + -27cosx = -9cosx
-9cosx = -18 + 27cosx + -27cosx

Combine like terms: 27cosx + -27cosx = 0
-9cosx = -18 + 0
-9cosx = -18

Divide each side by '-9osx'.
c = 2o-1s-1x-1

Simplifying
c = 2o-1s-1x-1

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