3(5-a)=

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Solution for 3(5-a)= equation: 


Simplifying
3(5 + -1a) = 0
(5 * 3 + -1a * 3) = 0
(15 + -3a) = 0

Solving
15 + -3a = 0

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 = 0 + -15

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

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

Divide each side by '-3'.
a = 5

Simplifying
a = 5

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