2a+(a+3)+a=75

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Solution for 2a+(a+3)+a=75 equation:


Simplifying
2a + (a + 3) + a = 75

Reorder the terms:
2a + (3 + a) + a = 75

Remove parenthesis around (3 + a)
2a + 3 + a + a = 75

Reorder the terms:
3 + 2a + a + a = 75

Combine like terms: 2a + a = 3a
3 + 3a + a = 75

Combine like terms: 3a + a = 4a
3 + 4a = 75

Solving
3 + 4a = 75

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 = 75 + -3

Combine like terms: 3 + -3 = 0
0 + 4a = 75 + -3
4a = 75 + -3

Combine like terms: 75 + -3 = 72
4a = 72

Divide each side by '4'.
a = 18

Simplifying
a = 18

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