Math Problem Statement
開店時、商品AとBがあり、このAとBの個数は6:5の比になっている。 午前中、Aは最初の10%が、Bは7個売れたので、いくつか追加した。追加した個数はAとBで等しい。 このとき、AとBの個数は9:8の比になり、開店時より35個多い。 開店時のAとBの個数を求めよ。 以上の連立方程式の文章題を解いてください。
Solution
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Math Problem Analysis
Mathematical Concepts
Algebra
Ratios
Simultaneous Equations
Formulas
Ratio formula: A_0 = 6x, B_0 = 5x
Sales reduction: 10% of A sold, 7 units of B sold
New ratio: (5.4x + y) / (5x - 7 + y) = 9 / 8
Total count equation: 10.4x + 2y - 7 = 11x + 35
Theorems
Linear equations
Proportionality
Suitable Grade Level
Grades 9-12
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