Question

Question #7multiplechoice score: in a certain candy store, 3 pounds of candy and 2 pounds of mints cost $10.80, and 1 pound of candy and 3 pounds of mints cost $5.35. what is the cost per pound of the mints?

Answer 1

Let the cost of one pound of candy be x and one pound of mint be y.

3x+2y=10.8 a 
x+3y = 5.35  b 
 B*3 = 3x+9y = 16.05 b
 
b-a = 7y = 16.05-10.8= 5.25
           y = 5.25/7 = 0.75 

The cost per pound of mints is $0.75