3(6-n)=21-6n

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Solution for 3(6-n)=21-6n equation:


Simplifying
3(6 + -1n) = 21 + -6n
(6 * 3 + -1n * 3) = 21 + -6n
(18 + -3n) = 21 + -6n

Solving
18 + -3n = 21 + -6n

Solving for variable 'n'.

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

Add '6n' to each side of the equation.
18 + -3n + 6n = 21 + -6n + 6n

Combine like terms: -3n + 6n = 3n
18 + 3n = 21 + -6n + 6n

Combine like terms: -6n + 6n = 0
18 + 3n = 21 + 0
18 + 3n = 21

Add '-18' to each side of the equation.
18 + -18 + 3n = 21 + -18

Combine like terms: 18 + -18 = 0
0 + 3n = 21 + -18
3n = 21 + -18

Combine like terms: 21 + -18 = 3
3n = 3

Divide each side by '3'.
n = 1

Simplifying
n = 1

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