Let's simplify the expression step by step:
3(5 - a) - 2(a - 7) + (2a + 1)(-3)= 3(5) - 3(a) - 2(a) + 2(7) + (-3)(2a) + (-3)(1) (distributing)= 15 - 3a - 2a + 14 - 6a - 3 (simplify within parentheses)= 15 - 3a - 2a + 14 - 6a - 3 (combine like terms)= 29 - 11a (combine like terms)
Therefore, the simplified expression is 29 - 11a.
Let's simplify the expression step by step:
3(5 - a) - 2(a - 7) + (2a + 1)(-3)
= 3(5) - 3(a) - 2(a) + 2(7) + (-3)(2a) + (-3)(1) (distributing)
= 15 - 3a - 2a + 14 - 6a - 3 (simplify within parentheses)
= 15 - 3a - 2a + 14 - 6a - 3 (combine like terms)
= 29 - 11a (combine like terms)
Therefore, the simplified expression is 29 - 11a.