2(5+a)=15

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Solution for 2(5+a)=15 equation: 


Simplifying
2(5 + a) = 15
(5 * 2 + a * 2) = 15
(10 + 2a) = 15

Solving
10 + 2a = 15

Solving for variable 'a'.

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

Add '-10' to each side of the equation.
10 + -10 + 2a = 15 + -10

Combine like terms: 10 + -10 = 0
0 + 2a = 15 + -10
2a = 15 + -10

Combine like terms: 15 + -10 = 5
2a = 5

Divide each side by '2'.
a = 2.5

Simplifying
a = 2.5

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