7n-21=3+n

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Solution for 7n-21=3+n equation:


Simplifying
7n + -21 = 3 + n

Reorder the terms:
-21 + 7n = 3 + n

Solving
-21 + 7n = 3 + n

Solving for variable 'n'.

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

Add '-1n' to each side of the equation.
-21 + 7n + -1n = 3 + n + -1n

Combine like terms: 7n + -1n = 6n
-21 + 6n = 3 + n + -1n

Combine like terms: n + -1n = 0
-21 + 6n = 3 + 0
-21 + 6n = 3

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

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

Combine like terms: 3 + 21 = 24
6n = 24

Divide each side by '6'.
n = 4

Simplifying
n = 4

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