Find the measures of all angles in a triangle ABC

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?

What is the value of x in the equation 1.5x+4-3=4.5(x-2)?

How do you write a paragraph proof to prove that the corresponding angles shown are congruent