a+3.1=1.2

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Solution for a+3.1=1.2 equation: 


Simplifying
a + 3.1 = 1.2

Reorder the terms:
3.1 + a = 1.2

Solving
3.1 + a = 1.2

Solving for variable 'a'.

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

Add '-3.1' to each side of the equation.
3.1 + -3.1 + a = 1.2 + -3.1

Combine like terms: 3.1 + -3.1 = 0.0
0.0 + a = 1.2 + -3.1
a = 1.2 + -3.1

Combine like terms: 1.2 + -3.1 = -1.9
a = -1.9

Simplifying
a = -1.9

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