[9(a+5)-15]+[3(a-3)+5]=

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Solution for [9(a+5)-15]+[3(a-3)+5]= equation:


Simplifying
[9(a + 5) + -15] + [3(a + -3) + 5] = 0

Reorder the terms:
[9(5 + a) + -15] + [3(a + -3) + 5] = 0
[(5 * 9 + a * 9) + -15] + [3(a + -3) + 5] = 0
[(45 + 9a) + -15] + [3(a + -3) + 5] = 0

Reorder the terms:
[45 + -15 + 9a] + [3(a + -3) + 5] = 0

Combine like terms: 45 + -15 = 30
[30 + 9a] + [3(a + -3) + 5] = 0

Remove brackets around [30 + 9a]
30 + 9a + [3(a + -3) + 5] = 0

Reorder the terms:
30 + 9a + [3(-3 + a) + 5] = 0
30 + 9a + [(-3 * 3 + a * 3) + 5] = 0
30 + 9a + [(-9 + 3a) + 5] = 0

Reorder the terms:
30 + 9a + [-9 + 5 + 3a] = 0

Combine like terms: -9 + 5 = -4
30 + 9a + [-4 + 3a] = 0

Remove brackets around [-4 + 3a]
30 + 9a + -4 + 3a = 0

Reorder the terms:
30 + -4 + 9a + 3a = 0

Combine like terms: 30 + -4 = 26
26 + 9a + 3a = 0

Combine like terms: 9a + 3a = 12a
26 + 12a = 0

Solving
26 + 12a = 0

Solving for variable 'a'.

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

Add '-26' to each side of the equation.
26 + -26 + 12a = 0 + -26

Combine like terms: 26 + -26 = 0
0 + 12a = 0 + -26
12a = 0 + -26

Combine like terms: 0 + -26 = -26
12a = -26

Divide each side by '12'.
a = -2.166666667

Simplifying
a = -2.166666667

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