12a-7b-(4a-12b)=

Solution for 12a-7b-(4a-12b)= equation:

Simplifying
12a + -7b + -1(4a + -12b) = 0
12a + -7b + (4a * -1 + -12b * -1) = 0
12a + -7b + (-4a + 12b) = 0

Reorder the terms:
12a + -4a + -7b + 12b = 0

Combine like terms: 12a + -4a = 8a
8a + -7b + 12b = 0

Combine like terms: -7b + 12b = 5b
8a + 5b = 0

Solving
8a + 5b = 0

Solving for variable 'a'.

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

Add '-5b' to each side of the equation.
8a + 5b + -5b = 0 + -5b

Combine like terms: 5b + -5b = 0
8a + 0 = 0 + -5b
8a = 0 + -5b
Remove the zero:
8a = -5b

Divide each side by '8'.
a = -0.625b

Simplifying
a = -0.625b