2(a+3)=4a+20

Solution for 2(a+3)=4a+20 equation:

Simplifying
2(a + 3) = 4a + 20

Reorder the terms:
2(3 + a) = 4a + 20
(3 * 2 + a * 2) = 4a + 20
(6 + 2a) = 4a + 20

Reorder the terms:
6 + 2a = 20 + 4a

Solving
6 + 2a = 20 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
6 + 2a + -4a = 20 + 4a + -4a

Combine like terms: 2a + -4a = -2a
6 + -2a = 20 + 4a + -4a

Combine like terms: 4a + -4a = 0
6 + -2a = 20 + 0
6 + -2a = 20

Add '-6' to each side of the equation.
6 + -6 + -2a = 20 + -6

Combine like terms: 6 + -6 = 0
0 + -2a = 20 + -6
-2a = 20 + -6

Combine like terms: 20 + -6 = 14
-2a = 14

Divide each side by '-2'.
a = -7

Simplifying
a = -7