What equation can be written as...???

With math question will mark brainliest question in the pic.

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Given abcd ac=38 and ae=3x+4 find the value of x