2+-1a+1+-2a=

Solution for 2+-1a+1+-2a= equation:

Simplifying
2 + -1a + 1 + -2a = 0

Reorder the terms:
2 + 1 + -1a + -2a = 0

Combine like terms: 2 + 1 = 3
3 + -1a + -2a = 0

Combine like terms: -1a + -2a = -3a
3 + -3a = 0

Solving
3 + -3a = 0

Solving for variable 'a'.

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

Add '-3' to each side of the equation.
3 + -3 + -3a = 0 + -3

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

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

Divide each side by '-3'.
a = 1

Simplifying
a = 1