a-2.1=-1.2

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Solution for a-2.1=-1.2 equation: 


Simplifying
a + -2.1 = -1.2

Reorder the terms:
-2.1 + a = -1.2

Solving
-2.1 + a = -1.2

Solving for variable 'a'.

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

Add '2.1' to each side of the equation.
-2.1 + 2.1 + a = -1.2 + 2.1

Combine like terms: -2.1 + 2.1 = 0.0
0.0 + a = -1.2 + 2.1
a = -1.2 + 2.1

Combine like terms: -1.2 + 2.1 = 0.9
a = 0.9

Simplifying
a = 0.9

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