Math Problem Statement
二次方程式の問題 3つの容器X,Y,Zがあり、Xにはx%の食塩水が500g、Yにはy%の食洗水が300g、Zには水が40g入っている。Xから食塩水100gをYに入れてよくかき混ぜた後、Yから食塩水120gを取り出してXに入れるとXとYに含まれる食塩の量が等しくなる。また、Xから取り出したX%の食塩水10xgとYから取り出したy%の食塩水10ygをZに入れてよくかきませると8%の食塩水になる。x,xyの値を求めよ
Solution
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Math Problem Analysis
Mathematical Concepts
Algebra
Concentration and Mixture Problems
Quadratic Equations
System of Equations
Formulas
Salt concentration formula: concentration % = (salt mass / solution mass) * 100
Quadratic equation: ax^2 + bx + c = 0
System of equations based on mass conservation in mixture problems
Theorems
Conservation of mass in a closed system
Quadratic formula
Suitable Grade Level
Grades 9-12
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