25-72=28-4a

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Solution for 25-72=28-4a equation:


Simplifying
25 + -72 = 28 + -4a

Combine like terms: 25 + -72 = -47
-47 = 28 + -4a

Solving
-47 = 28 + -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.
-47 + 4a = 28 + -4a + 4a

Combine like terms: -4a + 4a = 0
-47 + 4a = 28 + 0
-47 + 4a = 28

Add '47' to each side of the equation.
-47 + 47 + 4a = 28 + 47

Combine like terms: -47 + 47 = 0
0 + 4a = 28 + 47
4a = 28 + 47

Combine like terms: 28 + 47 = 75
4a = 75

Divide each side by '4'.
a = 18.75

Simplifying
a = 18.75

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