21-N=87+2N

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Solution for 21-N=87+2N equation:


Simplifying
21 + -1N = 87 + 2N

Solving
21 + -1N = 87 + 2N

Solving for variable 'N'.

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

Add '-2N' to each side of the equation.
21 + -1N + -2N = 87 + 2N + -2N

Combine like terms: -1N + -2N = -3N
21 + -3N = 87 + 2N + -2N

Combine like terms: 2N + -2N = 0
21 + -3N = 87 + 0
21 + -3N = 87

Add '-21' to each side of the equation.
21 + -21 + -3N = 87 + -21

Combine like terms: 21 + -21 = 0
0 + -3N = 87 + -21
-3N = 87 + -21

Combine like terms: 87 + -21 = 66
-3N = 66

Divide each side by '-3'.
N = -22

Simplifying
N = -22

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