2a-4=82.1

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Solution for 2a-4=82.1 equation: 


Simplifying
2a + -4 = 82.1

Reorder the terms:
-4 + 2a = 82.1

Solving
-4 + 2a = 82.1

Solving for variable 'a'.

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

Add '4' to each side of the equation.
-4 + 4 + 2a = 82.1 + 4

Combine like terms: -4 + 4 = 0
0 + 2a = 82.1 + 4
2a = 82.1 + 4

Combine like terms: 82.1 + 4 = 86.1
2a = 86.1

Divide each side by '2'.
a = 43.05

Simplifying
a = 43.05

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