Math Problem Statement
花子、優太、健太の3人姉弟が温泉旅行に行った。花子が全員の旅館代26,790円を支払い、優太が全員のタクシー代12,690円を支払い、健太が全員の昼食代を払った。自宅に帰った翌日精算したところ、優太は820円、健太は12,460円をそれぞれ花子へ支払うことになった。このとき1人あたりの昼食代はいくらか。
Solution
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Math Problem Analysis
Mathematical Concepts
Algebra
Linear Equations
Division
Proportional Distribution
Formulas
Total expense = 26,790 + 12,690 + x
Individual share = (39,480 + x) / 3
Difference calculation: (individual share - paid amount)
Theorems
Equation solving
Balancing equations
Suitable Grade Level
Grades 7-10
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