Cross Training Questions

Help with math problem?

A store sold 28 pairs of cross trainer shoes for a total of $2220. Style A sold for $70 and Style B sold for $90. How many of each were sold?

Public Comments

1. 14 and 14
2. Do Quantity over price. 28 pairs, over $2220. Then, let's say x= Style A Step 1 x+y= 28 y= Style B 70x+90y=2220 Step 2 -1( x+y= 28) ( Distributive Property) 70x+90y=2220 Step 3 70(-x-y= -28) ( Combination) 1(70x+90y=2220) Step 4 -70x-70y= -1960 70x+90y=2220 Step 5 The x cancels out, then 20y=260 Step 6 Divide = 13 of style B 15 of Style A Wanna check? Style A 15x70=1050 Style B 13x90=1170 ADD 1050+1170=2220