(a-2b)-(5a-6b)=

Solution for (a-2b)-(5a-6b)= equation:

Simplifying
(a + -2b) + -1(5a + -6b) = 0

Remove parenthesis around (a + -2b)
a + -2b + -1(5a + -6b) = 0
a + -2b + (5a * -1 + -6b * -1) = 0
a + -2b + (-5a + 6b) = 0

Reorder the terms:
a + -5a + -2b + 6b = 0

Combine like terms: a + -5a = -4a
-4a + -2b + 6b = 0

Combine like terms: -2b + 6b = 4b
-4a + 4b = 0

Solving
-4a + 4b = 0

Solving for variable 'a'.

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

Add '-4b' to each side of the equation.
-4a + 4b + -4b = 0 + -4b

Combine like terms: 4b + -4b = 0
-4a + 0 = 0 + -4b
-4a = 0 + -4b
Remove the zero:
-4a = -4b

Divide each side by '-4'.
a = b

Simplifying
a = b