3 a + 4 b − ( − 6 a − 3 b ) = 3 a + 4 b + 6 a + 3 b = 9 a + 7 b A n s w er : E . 9 a + 7 b
The expression 3 a + 4 b − ( − 6 a − 3 b ) simplifies to 9 a + 7 b . Thus, the correct answer is option E. The steps involved recognizing the effect of subtracting a negative and combining like terms.
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