a-(-3.4)=-12.8

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Solution for a-(-3.4)=-12.8 equation: 


Simplifying
a + -1(-3.4) = -12.8

Multiply -1 * -3.4
a + 3.4 = -12.8

Reorder the terms:
3.4 + a = -12.8

Solving
3.4 + a = -12.8

Solving for variable 'a'.

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

Add '-3.4' to each side of the equation.
3.4 + -3.4 + a = -12.8 + -3.4

Combine like terms: 3.4 + -3.4 = 0.0
0.0 + a = -12.8 + -3.4
a = -12.8 + -3.4

Combine like terms: -12.8 + -3.4 = -16.2
a = -16.2

Simplifying
a = -16.2

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