2a-21.2=a+1.8

Solution for 2a-21.2=a+1.8 equation:

Simplifying
2a + -21.2 = a + 1.8

Reorder the terms:
-21.2 + 2a = a + 1.8

Reorder the terms:
-21.2 + 2a = 1.8 + a

Solving
-21.2 + 2a = 1.8 + 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.
-21.2 + 2a + -1a = 1.8 + a + -1a

Combine like terms: 2a + -1a = 1a
-21.2 + 1a = 1.8 + a + -1a

Combine like terms: a + -1a = 0
-21.2 + 1a = 1.8 + 0
-21.2 + 1a = 1.8

Add '21.2' to each side of the equation.
-21.2 + 21.2 + 1a = 1.8 + 21.2

Combine like terms: -21.2 + 21.2 = 0.0
0.0 + 1a = 1.8 + 21.2
1a = 1.8 + 21.2

Combine like terms: 1.8 + 21.2 = 23
1a = 23

Divide each side by '1'.
a = 23

Simplifying
a = 23