(2a+b)-(a+2b)=

Solution for (2a+b)-(a+2b)= equation:

Simplifying
(2a + b) + -1(a + 2b) = 0

Remove parenthesis around (2a + b)
2a + b + -1(a + 2b) = 0
2a + b + (a * -1 + 2b * -1) = 0
2a + b + (-1a + -2b) = 0

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

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

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

Solving
1a + -1b = 0

Solving for variable 'a'.

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

Add 'b' to each side of the equation.
1a + -1b + b = 0 + b

Combine like terms: -1b + b = 0
1a + 0 = 0 + b
1a = 0 + b
Remove the zero:
1a = b

Divide each side by '1'.
a = b

Simplifying
a = b