15-3=n-1

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Solution for 15-3=n-1 equation:


Simplifying
15 + -3 = n + -1

Combine like terms: 15 + -3 = 12
12 = n + -1

Reorder the terms:
12 = -1 + n

Solving
12 = -1 + 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.
12 + -1n = -1 + n + -1n

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

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

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

Combine like terms: -1 + -12 = -13
-1n = -13

Divide each side by '-1'.
n = 13

Simplifying
n = 13

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