3(3a-5b)-(a-7b)=

Solution for 3(3a-5b)-(a-7b)= equation:

Simplifying
3(3a + -5b) + -1(a + -7b) = 0
(3a * 3 + -5b * 3) + -1(a + -7b) = 0
(9a + -15b) + -1(a + -7b) = 0
9a + -15b + (a * -1 + -7b * -1) = 0
9a + -15b + (-1a + 7b) = 0

Reorder the terms:
9a + -1a + -15b + 7b = 0

Combine like terms: 9a + -1a = 8a
8a + -15b + 7b = 0

Combine like terms: -15b + 7b = -8b
8a + -8b = 0

Solving
8a + -8b = 0

Solving for variable 'a'.

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

Add '8b' to each side of the equation.
8a + -8b + 8b = 0 + 8b

Combine like terms: -8b + 8b = 0
8a + 0 = 0 + 8b
8a = 0 + 8b
Remove the zero:
8a = 8b

Divide each side by '8'.
a = b

Simplifying
a = b