David works at the T-Shirt Shack selling tees. The equation y = 15x - 520 represents the profit that the T- Shirt Shack makes for each T - Shirt sold where y is the total profit and x us the number of t shirts sold. How many t shirts does the t shirt shack need to sell to make a profit of $140



Answer :

[140=15x-520
+520       +520
____________
660=15x
660/15=15x/15
x=44
44 t shirts does the t shirt shack need to sell to make a profit of $140

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