SOLUTION: "Stephan bought a cell phone, a hands-free ear piece, a carrying case all for $105.50, including tax. The phone was 7 times more expensive than the ear piece, and the case was $20

Question 926357: "Stephan bought a cell phone, a hands-free ear piece, a carrying case all for $105.50, including tax. The phone was 7 times more expensive than the ear piece, and the case was $20 more than the ear piece. How much did each item cost?" Help would be appreciated. Thanks!
Answer by JulietG(1812) (Show Source): You can put this solution on YOUR website!
P + E + C = 105.50
Hmmm...do you have a tax amount? Otherwise, we'll calculate the amount with tax included.
P = 7E
C = E+20
Substitute those values into the top equation.
7E + E + (E+20) = 105.50
9E + 20 = 105.50
9E = 85.50
E = 9.50
If E = 9.50, then C = 29.50
Since P is 7 times E, E then equals 66.50
66.50 + 9.50 + 29.50 = 105.50

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