Question

Determinați numerele întregi x pentru care: - 6 supra 2x+3 €Z​

Answer 1

-6 | 2x+3

2x+3={1,-1,2,-2,3,-3,6,-6}

2x={-2,-4,-1,-5,0,-6,3,-9}

x∈Z⇒ x={-1,-2,0,-3}