21(3n)+21n=84

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Solution for 21(3n)+21n=84 equation: 


Simplifying
21(3n) + 21n = 84

Remove parenthesis around (3n)
21 * 3n + 21n = 84

Multiply 21 * 3
63n + 21n = 84

Combine like terms: 63n + 21n = 84n
84n = 84

Solving
84n = 84

Solving for variable 'n'.

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

Divide each side by '84'.
n = 1

Simplifying
n = 1

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