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That could be interpreted in different ways. Sometimes "and" means "together with," sometimes "and" means "plus."

3 - 5(2 x a) or

3 - 10a simplified

The algebraic expression can be: 3 - (2 * a * 5).

The difficulty is in the phrase "two times a and five". The assumption of 2*a*5 may be incorrect since "and" implies addition. If so, depending on how the question is understood, the answer can be one of 3 - (2 * a + 5) or 3 - (2 * a) + 5 or even 3 - (2 * (a + 5)), each of which would give a different answer.

That is why we use the parenthesis in the mathematical expressions ;)

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10y ago

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