4(a+5)=5a

Solution for 4(a+5)=5a equation:

Simplifying
4(a + 5) = 5a

Reorder the terms:
4(5 + a) = 5a
(5 * 4 + a * 4) = 5a
(20 + 4a) = 5a

Solving
20 + 4a = 5a

Solving for variable 'a'.

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

Add '-5a' to each side of the equation.
20 + 4a + -5a = 5a + -5a

Combine like terms: 4a + -5a = -1a
20 + -1a = 5a + -5a

Combine like terms: 5a + -5a = 0
20 + -1a = 0

Add '-20' to each side of the equation.
20 + -20 + -1a = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -1a = 0 + -20
-1a = 0 + -20

Combine like terms: 0 + -20 = -20
-1a = -20

Divide each side by '-1'.
a = 20

Simplifying
a = 20