9+4(a-6)=66

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Solution for 9+4(a-6)=66 equation:


Simplifying
9 + 4(a + -6) = 66

Reorder the terms:
9 + 4(-6 + a) = 66
9 + (-6 * 4 + a * 4) = 66
9 + (-24 + 4a) = 66

Combine like terms: 9 + -24 = -15
-15 + 4a = 66

Solving
-15 + 4a = 66

Solving for variable 'a'.

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

Add '15' to each side of the equation.
-15 + 15 + 4a = 66 + 15

Combine like terms: -15 + 15 = 0
0 + 4a = 66 + 15
4a = 66 + 15

Combine like terms: 66 + 15 = 81
4a = 81

Divide each side by '4'.
a = 20.25

Simplifying
a = 20.25

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