13a-7(a+6)=

Solution for 13a-7(a+6)= equation:

Simplifying
13a + -7(a + 6) = 0

Reorder the terms:
13a + -7(6 + a) = 0
13a + (6 * -7 + a * -7) = 0
13a + (-42 + -7a) = 0

Reorder the terms:
-42 + 13a + -7a = 0

Combine like terms: 13a + -7a = 6a
-42 + 6a = 0

Solving
-42 + 6a = 0

Solving for variable 'a'.

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

Add '42' to each side of the equation.
-42 + 42 + 6a = 0 + 42

Combine like terms: -42 + 42 = 0
0 + 6a = 0 + 42
6a = 0 + 42

Combine like terms: 0 + 42 = 42
6a = 42

Divide each side by '6'.
a = 7

Simplifying
a = 7