Mayuran K. answered • 11/24/15

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Let the number of pounds of chicken be x and the number of pounds of beef be y

Since the total amount or sum of the meat bought is 18 lbs or first equation would be

x + y = 18

The second equation can be formed by using the details that beef costs 5.70 per pound and chicken costs 3.70

3.70x + 5.70y = 86.60

Now to solve these 2 equations you can use either elimination or substitution I'm using elimination

Multiply the first equation by -3.70

-3.70x - 3.70y = -66.60

Now add this to equation 2

2y = 20

y = 10

Now using the first equation

x = 18 - 10 = 8

Chicken purchased is 8 pounds and beef is 10 pounds