66=-6(-a-6)

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


Simplifying
66 = -6(-1a + -6)

Reorder the terms:
66 = -6(-6 + -1a)
66 = (-6 * -6 + -1a * -6)
66 = (36 + 6a)

Solving
66 = 36 + 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.
66 + -6a = 36 + 6a + -6a

Combine like terms: 6a + -6a = 0
66 + -6a = 36 + 0
66 + -6a = 36

Add '-66' to each side of the equation.
66 + -66 + -6a = 36 + -66

Combine like terms: 66 + -66 = 0
0 + -6a = 36 + -66
-6a = 36 + -66

Combine like terms: 36 + -66 = -30
-6a = -30

Divide each side by '-6'.
a = 5

Simplifying
a = 5

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