21=7(8+n)

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Solution for 21=7(8+n) equation:


Simplifying
21 = 7(8 + n)
21 = (8 * 7 + n * 7)
21 = (56 + 7n)

Solving
21 = 56 + 7n

Solving for variable 'n'.

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

Add '-7n' to each side of the equation.
21 + -7n = 56 + 7n + -7n

Combine like terms: 7n + -7n = 0
21 + -7n = 56 + 0
21 + -7n = 56

Add '-21' to each side of the equation.
21 + -21 + -7n = 56 + -21

Combine like terms: 21 + -21 = 0
0 + -7n = 56 + -21
-7n = 56 + -21

Combine like terms: 56 + -21 = 35
-7n = 35

Divide each side by '-7'.
n = -5

Simplifying
n = -5

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