Question 837957
Bob ate 10 carrots and 7 Hershey’s kisses and the total calories were 263. Fred ate 4 carrots and 8 Hershey’s kisses and the total calories were 230. How many calories are in a carrot and a Hershey’s kiss? 
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Equation:
10c + 7h = 263
4c  + 8h = 230
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Modify for  elimination::
40c + 28h = 4*263
40c + 80h = 2300
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Subtract and solve for "h":
52h = 1248
h = 24 (# of hershey kisses)
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Solve for "c":
4c + 8h = 230
c + 2h = 115
c = 115-2*24
c = 67 (# of carrots)
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Cheers,
Stan H.
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