21+7n=-7(3n-7)

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


Simplifying
21 + 7n = -7(3n + -7)

Reorder the terms:
21 + 7n = -7(-7 + 3n)
21 + 7n = (-7 * -7 + 3n * -7)
21 + 7n = (49 + -21n)

Solving
21 + 7n = 49 + -21n

Solving for variable 'n'.

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

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

Combine like terms: 7n + 21n = 28n
21 + 28n = 49 + -21n + 21n

Combine like terms: -21n + 21n = 0
21 + 28n = 49 + 0
21 + 28n = 49

Add '-21' to each side of the equation.
21 + -21 + 28n = 49 + -21

Combine like terms: 21 + -21 = 0
0 + 28n = 49 + -21
28n = 49 + -21

Combine like terms: 49 + -21 = 28
28n = 28

Divide each side by '28'.
n = 1

Simplifying
n = 1

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