6(a+12)-3=9a-15

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Solution for 6(a+12)-3=9a-15 equation:


Simplifying
6(a + 12) + -3 = 9a + -15

Reorder the terms:
6(12 + a) + -3 = 9a + -15
(12 * 6 + a * 6) + -3 = 9a + -15
(72 + 6a) + -3 = 9a + -15

Reorder the terms:
72 + -3 + 6a = 9a + -15

Combine like terms: 72 + -3 = 69
69 + 6a = 9a + -15

Reorder the terms:
69 + 6a = -15 + 9a

Solving
69 + 6a = -15 + 9a

Solving for variable 'a'.

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

Add '-9a' to each side of the equation.
69 + 6a + -9a = -15 + 9a + -9a

Combine like terms: 6a + -9a = -3a
69 + -3a = -15 + 9a + -9a

Combine like terms: 9a + -9a = 0
69 + -3a = -15 + 0
69 + -3a = -15

Add '-69' to each side of the equation.
69 + -69 + -3a = -15 + -69

Combine like terms: 69 + -69 = 0
0 + -3a = -15 + -69
-3a = -15 + -69

Combine like terms: -15 + -69 = -84
-3a = -84

Divide each side by '-3'.
a = 28

Simplifying
a = 28

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