a-15=-4(-6+3a)

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Solution for a-15=-4(-6+3a) equation:


Simplifying
a + -15 = -4(-6 + 3a)

Reorder the terms:
-15 + a = -4(-6 + 3a)
-15 + a = (-6 * -4 + 3a * -4)
-15 + a = (24 + -12a)

Solving
-15 + a = 24 + -12a

Solving for variable 'a'.

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

Add '12a' to each side of the equation.
-15 + a + 12a = 24 + -12a + 12a

Combine like terms: a + 12a = 13a
-15 + 13a = 24 + -12a + 12a

Combine like terms: -12a + 12a = 0
-15 + 13a = 24 + 0
-15 + 13a = 24

Add '15' to each side of the equation.
-15 + 15 + 13a = 24 + 15

Combine like terms: -15 + 15 = 0
0 + 13a = 24 + 15
13a = 24 + 15

Combine like terms: 24 + 15 = 39
13a = 39

Divide each side by '13'.
a = 3

Simplifying
a = 3

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