28-4=4+4a

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Solution for 28-4=4+4a equation:


Simplifying
28 + -4 = 4 + 4a

Combine like terms: 28 + -4 = 24
24 = 4 + 4a

Solving
24 = 4 + 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.
24 + -4a = 4 + 4a + -4a

Combine like terms: 4a + -4a = 0
24 + -4a = 4 + 0
24 + -4a = 4

Add '-24' to each side of the equation.
24 + -24 + -4a = 4 + -24

Combine like terms: 24 + -24 = 0
0 + -4a = 4 + -24
-4a = 4 + -24

Combine like terms: 4 + -24 = -20
-4a = -20

Divide each side by '-4'.
a = 5

Simplifying
a = 5

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