a store sells new DVDs for $12 each. used DVDs sell for $7 each. Joseph is buying two new DVDs and X used DVDs. write an equatio
n that can be used to find X, the total Joseph must pay in dollars
2 answers:
Given that new DVDs are selling for $12 and used for $7, then Joseph is buying:
12·2 + 7<em>x </em>=
Used DVDs = x
Total = t
t = 12(2) + 7x
t = 24 + 7x
t - 24 = 7x
(t - 24) / (7) = x
If given the total, you can plug it in to variable t and then work the right side of the equation to isolate variable x and solve to find its value.
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