4(a-9)=28

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Solution for 4(a-9)=28 equation: 


Simplifying
4(a + -9) = 28

Reorder the terms:
4(-9 + a) = 28
(-9 * 4 + a * 4) = 28
(-36 + 4a) = 28

Solving
-36 + 4a = 28

Solving for variable 'a'.

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

Add '36' to each side of the equation.
-36 + 36 + 4a = 28 + 36

Combine like terms: -36 + 36 = 0
0 + 4a = 28 + 36
4a = 28 + 36

Combine like terms: 28 + 36 = 64
4a = 64

Divide each side by '4'.
a = 16

Simplifying
a = 16

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