7cos-3=0

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Solution for 7cos-3=0 equation: 


Simplifying
7cos + -3 = 0

Reorder the terms:
-3 + 7cos = 0

Solving
-3 + 7cos = 0

Solving for variable 'c'.

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

Add '3' to each side of the equation.
-3 + 3 + 7cos = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 7cos = 0 + 3
7cos = 0 + 3

Combine like terms: 0 + 3 = 3
7cos = 3

Divide each side by '7os'.
c = 0.4285714286o-1s-1

Simplifying
c = 0.4285714286o-1s-1

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