Question

Rezolvati in multimea numerelor naturale ecuatiile:
X+18=25

27-x=19


7x=714


Va rog,repedeee!!!

Answer 1

x+18=25
x=25-18
x=7
S=7
7 apartine numerelor naturale
27-x=19
27-19=x
x=8
S=8
8 apartine numerelor naturale
7x=714
x=714:7
x=102
S=102
102 apartine numerelor naturale

Answer 2

*  x+18=25
   x=25-18
   x=7
   S={7}

*  27-x=19
   x=27-19
   x=8
   S={8}

*  7x=714
   x=714:7
   x=12
   S={12}