Suppose you invest 1500 in equipment to put pictures on T-shirts You buy each T-shirt for 3 After you have placed the picture on a shirt you sell it for 20 How many T-shirts must you sell to break eve?

First you have to set up the equation in slope intercept form:

y=3x+1500

y=20x

Now you solve:

20x=3x+1500

-3x -3x

17x=1500

/17 /17

x=88.235

Since you can not sell 88.2 T-Shirts you must round UP to 89, because if you round down to 88, you did not sell enough to break even.

Hope that helps!