3-(a-b)+(a-b)=

Solution for 3-(a-b)+(a-b)= equation:

Simplifying
3 + -1(a + -1b) + (a + -1b) = 0
3 + (a * -1 + -1b * -1) + (a + -1b) = 0
3 + (-1a + 1b) + (a + -1b) = 0

Remove parenthesis around (a + -1b)
3 + -1a + 1b + a + -1b = 0

Reorder the terms:
3 + -1a + a + 1b + -1b = 0

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

Combine like terms: 1b + -1b = 0
3 + 0 = 0
3 = 0

Solving
3 = 0

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.