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Novosadov [1.4K]

2 years ago

7

Can someone please help me i don’t get this at all!?

1 answer:

Verdich [7]2 years ago

8 0

She bought N pencils last month for 288, as the amount is in pennies. This month she bought N+12 for 720.

288/N = 720 / (N+12)
288(N+12) = 720N
288N + 3456 = 720N
3456 = 720N - 288N
3456=432N
N=8

She bought 8 pencils last month for 288, which is 36 cents each. And she bought 20 pencils this month for 720 which is 36 cents each. Hope this helped :)

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Another way to solve by factoring 1/4.

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