5n-(-2n)=-21

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Solution for 5n-(-2n)=-21 equation: 


Simplifying
5n + -1(-2n) = -21

Remove parenthesis around (-2n)
5n + -1 * -2n = -21

Multiply -1 * -2
5n + 2n = -21

Combine like terms: 5n + 2n = 7n
7n = -21

Solving
7n = -21

Solving for variable 'n'.

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

Divide each side by '7'.
n = -3

Simplifying
n = -3

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