3(5+a)=20

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Solution for 3(5+a)=20 equation: 


Simplifying
3(5 + a) = 20
(5 * 3 + a * 3) = 20
(15 + 3a) = 20

Solving
15 + 3a = 20

Solving for variable 'a'.

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

Add '-15' to each side of the equation.
15 + -15 + 3a = 20 + -15

Combine like terms: 15 + -15 = 0
0 + 3a = 20 + -15
3a = 20 + -15

Combine like terms: 20 + -15 = 5
3a = 5

Divide each side by '3'.
a = 1.666666667

Simplifying
a = 1.666666667

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