2n+42=5n-21

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Solution for 2n+42=5n-21 equation:


Simplifying
2n + 42 = 5n + -21

Reorder the terms:
42 + 2n = 5n + -21

Reorder the terms:
42 + 2n = -21 + 5n

Solving
42 + 2n = -21 + 5n

Solving for variable 'n'.

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

Add '-5n' to each side of the equation.
42 + 2n + -5n = -21 + 5n + -5n

Combine like terms: 2n + -5n = -3n
42 + -3n = -21 + 5n + -5n

Combine like terms: 5n + -5n = 0
42 + -3n = -21 + 0
42 + -3n = -21

Add '-42' to each side of the equation.
42 + -42 + -3n = -21 + -42

Combine like terms: 42 + -42 = 0
0 + -3n = -21 + -42
-3n = -21 + -42

Combine like terms: -21 + -42 = -63
-3n = -63

Divide each side by '-3'.
n = 21

Simplifying
n = 21

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