3(a+20)=81

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Solution for 3(a+20)=81 equation: 


Simplifying
3(a + 20) = 81

Reorder the terms:
3(20 + a) = 81
(20 * 3 + a * 3) = 81
(60 + 3a) = 81

Solving
60 + 3a = 81

Solving for variable 'a'.

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

Add '-60' to each side of the equation.
60 + -60 + 3a = 81 + -60

Combine like terms: 60 + -60 = 0
0 + 3a = 81 + -60
3a = 81 + -60

Combine like terms: 81 + -60 = 21
3a = 21

Divide each side by '3'.
a = 7

Simplifying
a = 7

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