(2a+3)+a=90

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Solution for (2a+3)+a=90 equation:


Simplifying
(2a + 3) + a = 90

Reorder the terms:
(3 + 2a) + a = 90

Remove parenthesis around (3 + 2a)
3 + 2a + a = 90

Combine like terms: 2a + a = 3a
3 + 3a = 90

Solving
3 + 3a = 90

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 + 3a = 90 + -3

Combine like terms: 3 + -3 = 0
0 + 3a = 90 + -3
3a = 90 + -3

Combine like terms: 90 + -3 = 87
3a = 87

Divide each side by '3'.
a = 29

Simplifying
a = 29

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