2a-18.9=a+2.1

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Solution for 2a-18.9=a+2.1 equation:


Simplifying
2a + -18.9 = a + 2.1

Reorder the terms:
-18.9 + 2a = a + 2.1

Reorder the terms:
-18.9 + 2a = 2.1 + a

Solving
-18.9 + 2a = 2.1 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-18.9 + 2a + -1a = 2.1 + a + -1a

Combine like terms: 2a + -1a = 1a
-18.9 + 1a = 2.1 + a + -1a

Combine like terms: a + -1a = 0
-18.9 + 1a = 2.1 + 0
-18.9 + 1a = 2.1

Add '18.9' to each side of the equation.
-18.9 + 18.9 + 1a = 2.1 + 18.9

Combine like terms: -18.9 + 18.9 = 0.0
0.0 + 1a = 2.1 + 18.9
1a = 2.1 + 18.9

Combine like terms: 2.1 + 18.9 = 21
1a = 21

Divide each side by '1'.
a = 21

Simplifying
a = 21

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