What is the result of adding these two equations

2x+7y=-8
2x-5y=-1

What is the relationship between all triangles that can be drawn given the same three angles

Can someone me with these two circle theorem questions asap?

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?