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

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


Simplifying
15a + -12b + -1(a + -3b) + -1(9a + 6b) = 0
15a + -12b + (a * -1 + -3b * -1) + -1(9a + 6b) = 0
15a + -12b + (-1a + 3b) + -1(9a + 6b) = 0
15a + -12b + -1a + 3b + (9a * -1 + 6b * -1) = 0
15a + -12b + -1a + 3b + (-9a + -6b) = 0

Reorder the terms:
15a + -1a + -9a + -12b + 3b + -6b = 0

Combine like terms: 15a + -1a = 14a
14a + -9a + -12b + 3b + -6b = 0

Combine like terms: 14a + -9a = 5a
5a + -12b + 3b + -6b = 0

Combine like terms: -12b + 3b = -9b
5a + -9b + -6b = 0

Combine like terms: -9b + -6b = -15b
5a + -15b = 0

Solving
5a + -15b = 0

Solving for variable 'a'.

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

Add '15b' to each side of the equation.
5a + -15b + 15b = 0 + 15b

Combine like terms: -15b + 15b = 0
5a + 0 = 0 + 15b
5a = 0 + 15b
Remove the zero:
5a = 15b

Divide each side by '5'.
a = 3b

Simplifying
a = 3b

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