2(a-1)+a=3

Solution for 2(a-1)+a=3 equation:

Simplifying
2(a + -1) + a = 3

Reorder the terms:
2(-1 + a) + a = 3
(-1 * 2 + a * 2) + a = 3
(-2 + 2a) + a = 3

Combine like terms: 2a + a = 3a
-2 + 3a = 3

Solving
-2 + 3a = 3

Solving for variable 'a'.

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

Add '2' to each side of the equation.
-2 + 2 + 3a = 3 + 2

Combine like terms: -2 + 2 = 0
0 + 3a = 3 + 2
3a = 3 + 2

Combine like terms: 3 + 2 = 5
3a = 5

Divide each side by '3'.
a = 1.666666667

Simplifying
a = 1.666666667