Question

Simplify the expression. Hint: Order of Operations, then Combine Like Terms.

Answer 1

Take out of parentathese
(3*2a)+(3*8b)-9b-a
6a+24b-9b-a
Combine like terms
(6a-a)+(24b-9b)
Answer:
5a+15b

Answer 2

$\\ \sf\bull\longmapsto 3(-2a+8b)-(9b-a)$

$\\ \sf\bull\longmapsto -6a+24b-9b+a$

$\\ \sf\bull\longmapsto -6a+a+24b-9b$

$\\ \sf\bull\longmapsto -5a+15b$

$\\ \sf\bull\longmapsto 15b-5a$