Question

aflati divizorii lui 20 si determinati numerele naturale x stiind ca 20 divizibil (x +3).

Answer 1

D20={1,2,4,5,10,20}
20 :(x+3)
x+3=1=> x=-2
x+3=2=> x=-1
x+3=4=> x=1
x+3=5=> x=2
x+3=10=> x=7
x+3=20=> x=17
x={1,2,7,17}