7n+21=-7(7-6n)

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Solution for 7n+21=-7(7-6n) equation:


Simplifying
7n + 21 = -7(7 + -6n)

Reorder the terms:
21 + 7n = -7(7 + -6n)
21 + 7n = (7 * -7 + -6n * -7)
21 + 7n = (-49 + 42n)

Solving
21 + 7n = -49 + 42n

Solving for variable 'n'.

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

Add '-42n' to each side of the equation.
21 + 7n + -42n = -49 + 42n + -42n

Combine like terms: 7n + -42n = -35n
21 + -35n = -49 + 42n + -42n

Combine like terms: 42n + -42n = 0
21 + -35n = -49 + 0
21 + -35n = -49

Add '-21' to each side of the equation.
21 + -21 + -35n = -49 + -21

Combine like terms: 21 + -21 = 0
0 + -35n = -49 + -21
-35n = -49 + -21

Combine like terms: -49 + -21 = -70
-35n = -70

Divide each side by '-35'.
n = 2

Simplifying
n = 2

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