5n+4n+7+8=42

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Solution for 5n+4n+7+8=42 equation:


Simplifying
5n + 4n + 7 + 8 = 42

Reorder the terms:
7 + 8 + 5n + 4n = 42

Combine like terms: 7 + 8 = 15
15 + 5n + 4n = 42

Combine like terms: 5n + 4n = 9n
15 + 9n = 42

Solving
15 + 9n = 42

Solving for variable 'n'.

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

Add '-15' to each side of the equation.
15 + -15 + 9n = 42 + -15

Combine like terms: 15 + -15 = 0
0 + 9n = 42 + -15
9n = 42 + -15

Combine like terms: 42 + -15 = 27
9n = 27

Divide each side by '9'.
n = 3

Simplifying
n = 3

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