-7a+7(a-6)=-39-a

Solution for -7a+7(a-6)=-39-a equation:

Simplifying
-7a + 7(a + -6) = -39 + -1a

Reorder the terms:
-7a + 7(-6 + a) = -39 + -1a
-7a + (-6 * 7 + a * 7) = -39 + -1a
-7a + (-42 + 7a) = -39 + -1a

Reorder the terms:
-42 + -7a + 7a = -39 + -1a

Combine like terms: -7a + 7a = 0
-42 + 0 = -39 + -1a
-42 = -39 + -1a

Solving
-42 = -39 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
-42 + a = -39 + -1a + a

Combine like terms: -1a + a = 0
-42 + a = -39 + 0
-42 + a = -39

Add '42' to each side of the equation.
-42 + 42 + a = -39 + 42

Combine like terms: -42 + 42 = 0
0 + a = -39 + 42
a = -39 + 42

Combine like terms: -39 + 42 = 3
a = 3

Simplifying
a = 3