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.