If the total cost of x apples is b cents, what is a general formula for the cost, in cents,of y apples?
2 answers:
If 'x' apples cost 'b' cents, then each apple costs (b/x) cents.
'Y' apples cost 'y' times the cost of each one . . . . . (y) times (b/x) or <em>yb/x cents</em>.
Y * (b/x) = the cost of y apples
Because by calculating b/x you get the price of 1 apple.
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