Haley E. answered • 07/05/16

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To solve this, you must set up a system of equations.

We'll say white shirts = w

Yellow = y.

Therefore:

w+y=18 (a total of 18 shirts sold)

9.95w + 11.5y = 200.8.

You could then solve this by changing the first equation to y = 18 - w and plugging this in for y in the second equation to look something like this:

9.95w + 11.5(18-w) = 200.8

Solve for w, and then you can solve for y.

Hope that helped! If you need any more help I'm available for online tutoring.