SOLUTION: solve : 1) The sum of the page numbers on facing pages of a book is 157; what are the page numbers? 2) A girl buys three apples and seven oranges for $4.56. If an orang

Question 135145: solve :

1) The sum of the page numbers on facing pages of a book is 157; what are the page numbers?
2) A girl buys three apples and seven oranges for $4.56. If an orange costs $0.28 more than an apple, how much does each fruit cost?
3) A woman buys three pairs of jeans for $99.84, including tax. If each pair of jeans cost $32, what was the sales tax rate?

Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
x+x+1=157
2x=157-1
2x=156
x=156/2
x=78 answer for the first page.
78+1=79 answer for the next page.
proof:
78+79=157
---------------------------------------
3A+7O=4.56
O=A+.28
3A+7(A+.28)=4.56
3A+7A+1.96=4.56
10A=4.56-1.96
10A=2.60
A=2.60/10
A=.26 PRICE OF 1 APPLE.
O=.26+28
O=.54 COST OF 1 ORANGE.
PROOF
3*.26+7*.54=4.56
.78+3.78=4.56
4.56=4.56

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