3(7-3n)=57

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Solution for 3(7-3n)=57 equation: 


Simplifying
3(7 + -3n) = 57
(7 * 3 + -3n * 3) = 57
(21 + -9n) = 57

Solving
21 + -9n = 57

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 + -9n = 57 + -21

Combine like terms: 21 + -21 = 0
0 + -9n = 57 + -21
-9n = 57 + -21

Combine like terms: 57 + -21 = 36
-9n = 36

Divide each side by '-9'.
n = -4

Simplifying
n = -4

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