3a-5b-9a-7b=

Solution for 3a-5b-9a-7b= equation:

Simplifying
3a + -5b + -9a + -7b = 0

Reorder the terms:
3a + -9a + -5b + -7b = 0

Combine like terms: 3a + -9a = -6a
-6a + -5b + -7b = 0

Combine like terms: -5b + -7b = -12b
-6a + -12b = 0

Solving
-6a + -12b = 0

Solving for variable 'a'.

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

Add '12b' to each side of the equation.
-6a + -12b + 12b = 0 + 12b

Combine like terms: -12b + 12b = 0
-6a + 0 = 0 + 12b
-6a = 0 + 12b
Remove the zero:
-6a = 12b

Divide each side by '-6'.
a = -2b

Simplifying
a = -2b