15-18a=-(6a-3)

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Solution for 15-18a=-(6a-3) equation:


Simplifying
15 + -18a = -1(6a + -3)

Reorder the terms:
15 + -18a = -1(-3 + 6a)
15 + -18a = (-3 * -1 + 6a * -1)
15 + -18a = (3 + -6a)

Solving
15 + -18a = 3 + -6a

Solving for variable 'a'.

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

Add '6a' to each side of the equation.
15 + -18a + 6a = 3 + -6a + 6a

Combine like terms: -18a + 6a = -12a
15 + -12a = 3 + -6a + 6a

Combine like terms: -6a + 6a = 0
15 + -12a = 3 + 0
15 + -12a = 3

Add '-15' to each side of the equation.
15 + -15 + -12a = 3 + -15

Combine like terms: 15 + -15 = 0
0 + -12a = 3 + -15
-12a = 3 + -15

Combine like terms: 3 + -15 = -12
-12a = -12

Divide each side by '-12'.
a = 1

Simplifying
a = 1

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