7n-21=7(2n+4)+7

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Solution for 7n-21=7(2n+4)+7 equation:


Simplifying
7n + -21 = 7(2n + 4) + 7

Reorder the terms:
-21 + 7n = 7(2n + 4) + 7

Reorder the terms:
-21 + 7n = 7(4 + 2n) + 7
-21 + 7n = (4 * 7 + 2n * 7) + 7
-21 + 7n = (28 + 14n) + 7

Reorder the terms:
-21 + 7n = 28 + 7 + 14n

Combine like terms: 28 + 7 = 35
-21 + 7n = 35 + 14n

Solving
-21 + 7n = 35 + 14n

Solving for variable 'n'.

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

Add '-14n' to each side of the equation.
-21 + 7n + -14n = 35 + 14n + -14n

Combine like terms: 7n + -14n = -7n
-21 + -7n = 35 + 14n + -14n

Combine like terms: 14n + -14n = 0
-21 + -7n = 35 + 0
-21 + -7n = 35

Add '21' to each side of the equation.
-21 + 21 + -7n = 35 + 21

Combine like terms: -21 + 21 = 0
0 + -7n = 35 + 21
-7n = 35 + 21

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

Divide each side by '-7'.
n = -8

Simplifying
n = -8

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