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Answer:
3a−3.
Step-by-step explanation:
To simplify the expression -3a + 4 + 5a - 7 + a, combine the like terms: -3a + 5a + a equals 3a, and 4 - 7 equals -3. Therefore, the simplified expression is 3a - 3.To simplify the expression -3a + 4 + 5a - 7 + a, combine the like terms: -3a + 5a + a equals 3a, and 4 - 7 equals -3. Therefore, the simplified expression is 3a - 3.