Explain what i am to do with this problem
1x= -1; x+5=4

Someone me! if you’re smart you can solve this!

Due to bad planning, two of the local schools have their annual plays on the same weekend. while 457 people attend one, and 372 attend the other, only 104 people were able to attend both. how many people went to at least one play?

Need same math paper but the back now i hope your able to read it cleary i need with hw