Jesse D. answered • 03/15/20

Patient and Experienced Mathematics and Spanish Tutor

Hi there! I'd love to help you out

Let's say our blue t-shirts are "x". It says he sold three times as many white shirts as blue shirts. So to find the number of white shirts we multiply 3 times our blue shirts "x".:

x = blue shirts

3x = white shirts

Now it says he sold a total of 40 shirts. So if we add up our blue and white shirts we get 40:

x + 3x = 40

4x = 40

/4 /4

x = 10 blue shirts

3*10=30 white shirts

So he sold 10 blue shirts and 30 white shirts. I hope this explanation was thorough and answered all of your questions. If you have additional questions please don't hesitate to reach out. Learn on! :)