18=9+6(a-4)

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Solution for 18=9+6(a-4) equation:


Simplifying
18 = 9 + 6(a + -4)

Reorder the terms:
18 = 9 + 6(-4 + a)
18 = 9 + (-4 * 6 + a * 6)
18 = 9 + (-24 + 6a)

Combine like terms: 9 + -24 = -15
18 = -15 + 6a

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

Combine like terms: 6a + -6a = 0
18 + -6a = -15 + 0
18 + -6a = -15

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

Combine like terms: 18 + -18 = 0
0 + -6a = -15 + -18
-6a = -15 + -18

Combine like terms: -15 + -18 = -33
-6a = -33

Divide each side by '-6'.
a = 5.5

Simplifying
a = 5.5

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