=4(a+9)

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Solution for =4(a+9) equation: 


Simplifying
0 = 4(a + 9)

Reorder the terms:
0 = 4(9 + a)
0 = (9 * 4 + a * 4)
0 = (36 + 4a)

Solving
0 = 36 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
0 + -4a = 36 + 4a + -4a
Remove the zero:
-4a = 36 + 4a + -4a

Combine like terms: 4a + -4a = 0
-4a = 36 + 0
-4a = 36

Divide each side by '-4'.
a = -9

Simplifying
a = -9

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