Answer:
what is the question ? but i dont know ans
Let x be the number of pennies which is also equal to the number of dimes. By this representation, the number of quarters is equal 46 - 2x. The total amount is $4.87 or 487 cents. The equation that best represent the given is,
x + 10x + 25(46 - 2x) = 487
The value of x from the equation is 17. Therefore, there are 17 of both pennies and dimes and 12 quarters.
Andy bought 21 packs. Harry bought 12 packs. Erin bought 21 packs.
(x + 5) * (x − 5) =
x² - 25
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x * x = x² and 5 * (-5) = -25