15+3=n+12

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Solution for 15+3=n+12 equation:


Simplifying
15 + 3 = n + 12

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

Reorder the terms:
18 = 12 + n

Solving
18 = 12 + n

Solving for variable 'n'.

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

Add '-1n' to each side of the equation.
18 + -1n = 12 + n + -1n

Combine like terms: n + -1n = 0
18 + -1n = 12 + 0
18 + -1n = 12

Add '-18' to each side of the equation.
18 + -18 + -1n = 12 + -18

Combine like terms: 18 + -18 = 0
0 + -1n = 12 + -18
-1n = 12 + -18

Combine like terms: 12 + -18 = -6
-1n = -6

Divide each side by '-1'.
n = 6

Simplifying
n = 6

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