Math Problem Statement
Rayner mempunyai 20 koin. Itu adalah koin $1, 50¢koin dan 20¢koin. Dia menghabiskan setengah dari jumlah setiap jenis koin untuk makan siang seharga $5. Berapa banyak koin $1 yang dia miliki pada awalnya
Solution
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Math Problem Analysis
Mathematical Concepts
Linear Equations
Substitution Method
Elimination Method
Formulas
Equation of a Line
System of Linear Equations
Theorems
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Suitable Grade Level
Grades 7-9
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