4(a-1)+4(a+1)=16

Solution for 4(a-1)+4(a+1)=16 equation:

Simplifying
4(a + -1) + 4(a + 1) = 16

Reorder the terms:
4(-1 + a) + 4(a + 1) = 16
(-1 * 4 + a * 4) + 4(a + 1) = 16
(-4 + 4a) + 4(a + 1) = 16

Reorder the terms:
-4 + 4a + 4(1 + a) = 16
-4 + 4a + (1 * 4 + a * 4) = 16
-4 + 4a + (4 + 4a) = 16

Reorder the terms:
-4 + 4 + 4a + 4a = 16

Combine like terms: -4 + 4 = 0
0 + 4a + 4a = 16
4a + 4a = 16

Combine like terms: 4a + 4a = 8a
8a = 16

Solving
8a = 16

Solving for variable 'a'.

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

Divide each side by '8'.
a = 2

Simplifying
a = 2