66=-6(-2a-3)

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Solution for 66=-6(-2a-3) equation:


Simplifying
66 = -6(-2a + -3)

Reorder the terms:
66 = -6(-3 + -2a)
66 = (-3 * -6 + -2a * -6)
66 = (18 + 12a)

Solving
66 = 18 + 12a

Solving for variable 'a'.

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

Add '-12a' to each side of the equation.
66 + -12a = 18 + 12a + -12a

Combine like terms: 12a + -12a = 0
66 + -12a = 18 + 0
66 + -12a = 18

Add '-66' to each side of the equation.
66 + -66 + -12a = 18 + -66

Combine like terms: 66 + -66 = 0
0 + -12a = 18 + -66
-12a = 18 + -66

Combine like terms: 18 + -66 = -48
-12a = -48

Divide each side by '-12'.
a = 4

Simplifying
a = 4

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