15=2(n-1)-3

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Solution for 15=2(n-1)-3 equation:


Simplifying
15 = 2(n + -1) + -3

Reorder the terms:
15 = 2(-1 + n) + -3
15 = (-1 * 2 + n * 2) + -3
15 = (-2 + 2n) + -3

Reorder the terms:
15 = -2 + -3 + 2n

Combine like terms: -2 + -3 = -5
15 = -5 + 2n

Solving
15 = -5 + 2n

Solving for variable 'n'.

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

Add '-2n' to each side of the equation.
15 + -2n = -5 + 2n + -2n

Combine like terms: 2n + -2n = 0
15 + -2n = -5 + 0
15 + -2n = -5

Add '-15' to each side of the equation.
15 + -15 + -2n = -5 + -15

Combine like terms: 15 + -15 = 0
0 + -2n = -5 + -15
-2n = -5 + -15

Combine like terms: -5 + -15 = -20
-2n = -20

Divide each side by '-2'.
n = 10

Simplifying
n = 10

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