I have the answer but i cant type an infinity symbol
Someone is writing the answer so ill just give you this tip for whenever.
A negitive times a negitive is positive
a negative times a positive is negitive
and a positive times a positive is positive (just had to add it to be complete)
all of them except the last efg and bcd
Answer:
I think I got it right! I think it's x=4
if not I'm sorry :(