15a-(3a)=60

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Solution for 15a-(3a)=60 equation: 


Simplifying
15a + -1(3a) = 60

Remove parenthesis around (3a)
15a + -1 * 3a = 60

Multiply -1 * 3
15a + -3a = 60

Combine like terms: 15a + -3a = 12a
12a = 60

Solving
12a = 60

Solving for variable 'a'.

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

Divide each side by '12'.
a = 5

Simplifying
a = 5

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