15=3-(a+5)

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Solution for 15=3-(a+5) equation:


Simplifying
15 = 3 + -1(a + 5)

Reorder the terms:
15 = 3 + -1(5 + a)
15 = 3 + (5 * -1 + a * -1)
15 = 3 + (-5 + -1a)

Combine like terms: 3 + -5 = -2
15 = -2 + -1a

Solving
15 = -2 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
15 + a = -2 + -1a + a

Combine like terms: -1a + a = 0
15 + a = -2 + 0
15 + a = -2

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

Combine like terms: 15 + -15 = 0
0 + a = -2 + -15
a = -2 + -15

Combine like terms: -2 + -15 = -17
a = -17

Simplifying
a = -17

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