42a-38.5=12.5+25a

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Solution for 42a-38.5=12.5+25a equation: 


Simplifying
42a + -38.5 = 12.5 + 25a

Reorder the terms:
-38.5 + 42a = 12.5 + 25a

Solving
-38.5 + 42a = 12.5 + 25a

Solving for variable 'a'.

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

Add '-25a' to each side of the equation.
-38.5 + 42a + -25a = 12.5 + 25a + -25a

Combine like terms: 42a + -25a = 17a
-38.5 + 17a = 12.5 + 25a + -25a

Combine like terms: 25a + -25a = 0
-38.5 + 17a = 12.5 + 0
-38.5 + 17a = 12.5

Add '38.5' to each side of the equation.
-38.5 + 38.5 + 17a = 12.5 + 38.5

Combine like terms: -38.5 + 38.5 = 0.0
0.0 + 17a = 12.5 + 38.5
17a = 12.5 + 38.5

Combine like terms: 12.5 + 38.5 = 51
17a = 51

Divide each side by '17'.
a = 3

Simplifying
a = 3

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