-3(7+5n)=-81

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Solution for -3(7+5n)=-81 equation: 


Simplifying
-3(7 + 5n) = -81
(7 * -3 + 5n * -3) = -81
(-21 + -15n) = -81

Solving
-21 + -15n = -81

Solving for variable 'n'.

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

Add '21' to each side of the equation.
-21 + 21 + -15n = -81 + 21

Combine like terms: -21 + 21 = 0
0 + -15n = -81 + 21
-15n = -81 + 21

Combine like terms: -81 + 21 = -60
-15n = -60

Divide each side by '-15'.
n = 4

Simplifying
n = 4

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