Answer: What are you asking ?
Step-by-step explanation:
Answer:
Lithium
Explanation:
Lithium batteries features primary cell construction.They are single-use or non rechargeable batteries
7(3r-1)-(r+5)=-52
21r-7-r-5=-52
21r-r-5-7=-52
20r-12=-52
Add 12 to both sides
20r=-40
Divide by 20
r=-2