[중2 수학, 일차부등식의 활용, 유리한 방법, 할인점 문제] 3초만에 푸는 쉽고 빠른 방법
Synopsis
Q. 집 앞 편의점에서 과자 가격은 하나에 1500원이고, 할인점에서는 1200원이다. 할인점을 다녀오는데 왕복 버스비가 2100원이라고 ...
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