Answer:

Explanation:
Now we have to,
→ Simplify the given expression,
The expression is,
→ 15s + 23(1903 - s)
Let's simplify the expression,
→ 15s + 23(1903 - s)
→ 15s + 23(1903) - 23(s)
→ 15s + 43769 - 23s
→ (15s - 23s) + 43769
→ (-8s) + 43769
→ -8s + 43769
Hence, answer is -8s + 43769.