-a-15=4(9-12a)-4a

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Solution for -a-15=4(9-12a)-4a equation:


Simplifying
-1a + -15 = 4(9 + -12a) + -4a

Reorder the terms:
-15 + -1a = 4(9 + -12a) + -4a
-15 + -1a = (9 * 4 + -12a * 4) + -4a
-15 + -1a = (36 + -48a) + -4a

Combine like terms: -48a + -4a = -52a
-15 + -1a = 36 + -52a

Solving
-15 + -1a = 36 + -52a

Solving for variable 'a'.

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

Add '52a' to each side of the equation.
-15 + -1a + 52a = 36 + -52a + 52a

Combine like terms: -1a + 52a = 51a
-15 + 51a = 36 + -52a + 52a

Combine like terms: -52a + 52a = 0
-15 + 51a = 36 + 0
-15 + 51a = 36

Add '15' to each side of the equation.
-15 + 15 + 51a = 36 + 15

Combine like terms: -15 + 15 = 0
0 + 51a = 36 + 15
51a = 36 + 15

Combine like terms: 36 + 15 = 51
51a = 51

Divide each side by '51'.
a = 1

Simplifying
a = 1

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