Solve x≡2(mod7)x \equiv 2 \pmod{7}x≡2(mod7) and x≡4(mod9)x \equiv 4 \pmod{9}x≡4(mod9).
x≡9(mod63)x \equiv 9 \pmod{63}x≡9(mod63)
x≡16(mod63)x \equiv 16 \pmod{63}x≡16(mod63)
x≡23(mod63)x \equiv 23 \pmod{63}x≡23(mod63)
x≡30(mod63)x \equiv 30 \pmod{63}x≡30(mod63)