5(a-12)+(2a+15)=a-9

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Solution for 5(a-12)+(2a+15)=a-9 equation:


Simplifying
5(a + -12) + (2a + 15) = a + -9

Reorder the terms:
5(-12 + a) + (2a + 15) = a + -9
(-12 * 5 + a * 5) + (2a + 15) = a + -9
(-60 + 5a) + (2a + 15) = a + -9

Reorder the terms:
-60 + 5a + (15 + 2a) = a + -9

Remove parenthesis around (15 + 2a)
-60 + 5a + 15 + 2a = a + -9

Reorder the terms:
-60 + 15 + 5a + 2a = a + -9

Combine like terms: -60 + 15 = -45
-45 + 5a + 2a = a + -9

Combine like terms: 5a + 2a = 7a
-45 + 7a = a + -9

Reorder the terms:
-45 + 7a = -9 + a

Solving
-45 + 7a = -9 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-45 + 7a + -1a = -9 + a + -1a

Combine like terms: 7a + -1a = 6a
-45 + 6a = -9 + a + -1a

Combine like terms: a + -1a = 0
-45 + 6a = -9 + 0
-45 + 6a = -9

Add '45' to each side of the equation.
-45 + 45 + 6a = -9 + 45

Combine like terms: -45 + 45 = 0
0 + 6a = -9 + 45
6a = -9 + 45

Combine like terms: -9 + 45 = 36
6a = 36

Divide each side by '6'.
a = 6

Simplifying
a = 6

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