Math Problem Statement

Résoudre 21x≡15(mod18)

Solution

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Math Problem Analysis

Mathematical Concepts

Number Theory
Modular Arithmetic
Congruence Equations

Formulas

Simplification of congruence equation
x ≡ b (mod m)

Theorems

Greatest Common Divisor (GCD)
Linear Congruence Theorem

Suitable Grade Level

Grades 10-12