Answer:
- 8a - 21
Step-by-step explanation:
2(2a-3)-3(4a+5)
=4a-6-3(4a+5)
=4a-6-12a-15
=4a-21-12a
= -8a-21
-5
around 190
R=10
-2×-3=6
R=5×2
=10