Popsicles

Francis went to buy ice lollies. If he buy 8 popsicles he missed 4 USD. When he buy 7 popsicles, got back 1 USD.

How many USD was a popsicle?

Result

p =  5

Solution:

8p=x+4 7p=x1  8p7p=x+4(x1) p=4+1=58 p = x + 4 \ \\ 7 p = x- 1 \ \\ \ \\ 8 p - 7 p = x+4 - (x-1 ) \ \\ p = 4 + 1 = 5



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