Simplify 9 + 3 ( 4a - 7 ) - 5a + 6
To simplify the expression, we can start by distributing the 3 to each term inside the parentheses:
9 + 3(4a - 7) - 5a + 6
= 9 + 12a - 21 - 5a + 6
Next, we can combine like terms:
= (12a - 5a) + (9 - 21 + 6)
= 7a + (-6)
= 7a - 6
So, the simplified expression is 7a - 6.