=7cos(-x)

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Solution for =7cos(-x) equation:


Simplifying
0 = 7cos(-1x)

Remove parenthesis around (-1x)
0 = 7cos * -1x

Reorder the terms for easier multiplication:
0 = 7 * -1cos * x

Multiply 7 * -1
0 = -7cos * x

Multiply cos * x
0 = -7cosx

Solving
0 = -7cosx

Solving for variable 'c'.

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

Add '7cosx' to each side of the equation.
0 + 7cosx = -7cosx + 7cosx
Remove the zero:
7cosx = -7cosx + 7cosx

Combine like terms: -7cosx + 7cosx = 0
7cosx = 0

Divide each side by '7'.
cosx = 0

Simplifying
cosx = 0

The solution to this equation could not be determined.

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