21=-1-4n-7n

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Solution for 21=-1-4n-7n equation:


Simplifying
21 = -1 + -4n + -7n

Combine like terms: -4n + -7n = -11n
21 = -1 + -11n

Solving
21 = -1 + -11n

Solving for variable 'n'.

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

Add '11n' to each side of the equation.
21 + 11n = -1 + -11n + 11n

Combine like terms: -11n + 11n = 0
21 + 11n = -1 + 0
21 + 11n = -1

Add '-21' to each side of the equation.
21 + -21 + 11n = -1 + -21

Combine like terms: 21 + -21 = 0
0 + 11n = -1 + -21
11n = -1 + -21

Combine like terms: -1 + -21 = -22
11n = -22

Divide each side by '11'.
n = -2

Simplifying
n = -2

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