a-2.5=18.5

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Solution for a-2.5=18.5 equation: 


Simplifying
a + -2.5 = 18.5

Reorder the terms:
-2.5 + a = 18.5

Solving
-2.5 + a = 18.5

Solving for variable 'a'.

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

Add '2.5' to each side of the equation.
-2.5 + 2.5 + a = 18.5 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + a = 18.5 + 2.5
a = 18.5 + 2.5

Combine like terms: 18.5 + 2.5 = 21
a = 21

Simplifying
a = 21

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