15=-5(a+1)

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Solution for 15=-5(a+1) equation:


Simplifying
15 = -5(a + 1)

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

Solving
15 = -5 + -5a

Solving for variable 'a'.

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

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

Combine like terms: -5a + 5a = 0
15 + 5a = -5 + 0
15 + 5a = -5

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

Combine like terms: 15 + -15 = 0
0 + 5a = -5 + -15
5a = -5 + -15

Combine like terms: -5 + -15 = -20
5a = -20

Divide each side by '5'.
a = -4

Simplifying
a = -4

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