Answer:
23s-7
Step-by-step explanation:
Expand the brackets
17s-10+6s+3
Collect like terms (-10+3 & 17s+6s)
23s-7.
B
17s - 10 + 3 (2s + 1)
17s - 10 + 6s + 3
23s - 10 + 3
23s - 7
