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

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

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

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

Combine like terms: -5a + -2a = -7a
-7a + 5b + 2b = 0

Combine like terms: 5b + 2b = 7b
-7a + 7b = 0

Solving
-7a + 7b = 0

Solving for variable 'a'.

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

Add '-7b' to each side of the equation.
-7a + 7b + -7b = 0 + -7b

Combine like terms: 7b + -7b = 0
-7a + 0 = 0 + -7b
-7a = 0 + -7b
Remove the zero:
-7a = -7b

Divide each side by '-7'.
a = b

Simplifying
a = b