Math Problem Statement
18kmの道のりで、徒歩で時速4km、途中から走って時速9km、そして4時間かかった。それぞれの距離を連立方程式を用いて求めなさい
Solution
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Math Problem Analysis
Mathematical Concepts
Algebra
Simultaneous Equations
Linear Equations
Formulas
Distance = Speed × Time
Linear equation formula ax + by = c
Theorems
Linear equation solving methods
Suitable Grade Level
Grades 8-10
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