0.5+a+2a=12.5

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Solution for 0.5+a+2a=12.5 equation: 


Simplifying
0.5 + a + 2a = 12.5

Combine like terms: a + 2a = 3a
0.5 + 3a = 12.5

Solving
0.5 + 3a = 12.5

Solving for variable 'a'.

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

Add '-0.5' to each side of the equation.
0.5 + -0.5 + 3a = 12.5 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + 3a = 12.5 + -0.5
3a = 12.5 + -0.5

Combine like terms: 12.5 + -0.5 = 12
3a = 12

Divide each side by '3'.
a = 4

Simplifying
a = 4

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