3.9+2.6+2.7+a=12.3

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Solution for 3.9+2.6+2.7+a=12.3 equation: 


Simplifying
3.9 + 2.6 + 2.7 + a = 12.3

Combine like terms: 3.9 + 2.6 = 6.5
6.5 + 2.7 + a = 12.3

Combine like terms: 6.5 + 2.7 = 9.2
9.2 + a = 12.3

Solving
9.2 + a = 12.3

Solving for variable 'a'.

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

Add '-9.2' to each side of the equation.
9.2 + -9.2 + a = 12.3 + -9.2

Combine like terms: 9.2 + -9.2 = 0.0
0.0 + a = 12.3 + -9.2
a = 12.3 + -9.2

Combine like terms: 12.3 + -9.2 = 3.1
a = 3.1

Simplifying
a = 3.1

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