2a+2a-3a=15

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Solution for 2a+2a-3a=15 equation: 


Simplifying
2a + 2a + -3a = 15

Combine like terms: 2a + 2a = 4a
4a + -3a = 15

Combine like terms: 4a + -3a = 1a
1a = 15

Solving
1a = 15

Solving for variable 'a'.

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

Divide each side by '1'.
a = 15

Simplifying
a = 15

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