Question

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3x-3=6 in Z9.

cate solutii are ecuatia?

Answer 1

3x=6+3
3x=9
x=9/3
x=3 are o singura solutie

Answer 2

3x-3=6
3x=6+3
3x=9
x=3⇒3∈Z⇒x∈Z⇒x poate lua o singura valoare numerica deci ecuatia are o singura solutie;