2a+(3+a)+a=39

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Solution for 2a+(3+a)+a=39 equation:


Simplifying
2a + (3 + a) + a = 39

Remove parenthesis around (3 + a)
2a + 3 + a + a = 39

Reorder the terms:
3 + 2a + a + a = 39

Combine like terms: 2a + a = 3a
3 + 3a + a = 39

Combine like terms: 3a + a = 4a
3 + 4a = 39

Solving
3 + 4a = 39

Solving for variable 'a'.

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

Add '-3' to each side of the equation.
3 + -3 + 4a = 39 + -3

Combine like terms: 3 + -3 = 0
0 + 4a = 39 + -3
4a = 39 + -3

Combine like terms: 39 + -3 = 36
4a = 36

Divide each side by '4'.
a = 9

Simplifying
a = 9

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