I’d say -1 but you probably need a better answer so I’d say -2.5
Answer:
The money that Bruce Wayne donates to local charities last week was $5,600
Step-by-step explanation:
Let
x ----> the money that Bruce Wayne spend on research last week
y ----> the money that Bruce Wayne donates to local charities ls week
we know that

-----> equation A
----> equation B
equate equation A and equation B and solve for y

therefore
The money that Bruce Wayne donates to local charities last week was $5,600
What? Lol I will lyk if I see him/her.