15n-3n-18=42

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Solution for 15n-3n-18=42 equation:


Simplifying
15n + -3n + -18 = 42

Reorder the terms:
-18 + 15n + -3n = 42

Combine like terms: 15n + -3n = 12n
-18 + 12n = 42

Solving
-18 + 12n = 42

Solving for variable 'n'.

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

Add '18' to each side of the equation.
-18 + 18 + 12n = 42 + 18

Combine like terms: -18 + 18 = 0
0 + 12n = 42 + 18
12n = 42 + 18

Combine like terms: 42 + 18 = 60
12n = 60

Divide each side by '12'.
n = 5

Simplifying
n = 5

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