Question 664202
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Lone Star
c = 14 + 2x, where x is the number of pounds
Discount
c = 20 + 1.5x
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At what weight are the charges the same?  Set them equal to each other and solve for x.
14 + 2x = 20 + 1.5x
Group like terms
2x - 1.5x = 20 - 14
Combine like terms
.5x = 6
Divide both sides by .5
x = 12
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When the weight is 12 lbs, the charges at both companies are the same.
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