Math Problem Statement
yがxに比例し、xの値が3ずつ増加するとき、yの値が2ずつ減少する。比例の式を求めよ。
Solution
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Math Problem Analysis
Mathematical Concepts
Direct Proportionality
Linear Equations
Formulas
y = kx
y(x+3) - y(x) = -2
Theorems
Linear Proportionality
Suitable Grade Level
Grades 8-10