Has 20 crayons . i find 8 crayons . the rest are in the box . how many crayons are in the box?

Question: what is the value of x 4x-2= (-7) +5x. it would be greatly appreciated if someone could actually explain to me step by step

For what values of x is x2 + 2x = 24 true?

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?