Question 1131850
At a candy store, Erika bought 3 kilograms of cinnamon red hots and 1 kilogram of gummy bears for $21.00. Meanwhile, Irene bought 3 kilograms of cinnamon red hots and 3 kilograms of gummy bears for $39.00. What is the cost of one kilogram of each type of candy? 
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Equations:
3r + 1g = 21.00
3r + 3g= 39.00
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Subtract and solve for "g"::
2g = 2.00
g = $1.00/kg (gummy bear cost)
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Solve for "r":
3r + g = 21
3r + 1 = 21
r = $20/3 = $6.67/kg (red hot oost)
Cheers,
Stan H.