Răspuns :
Explicație pas cu pas:
x+2|2x+7
x+2|x+2 => x+2|2x+4
=> x+2|2x+7-2x-4 =>x+2|3 => x+2€D3 inZ =>
x+2€{-3,-1,1,3} =>
x€{-5,-3,-1,1}
Explicație pas cu pas:
x+2|2x+7
x+2|x+2 => x+2|2x+4
=> x+2|2x+7-2x-4 =>x+2|3 => x+2€D3 inZ =>
x+2€{-3,-1,1,3} =>
x€{-5,-3,-1,1}