Question

verificati daca numarul 3 este solutia urmatoarei ecuati x+5=8| 6x=18| 24:x=6| 75-x=72| 2x+9=13| 3(5-x)=6

Answer 1

x+5=8    x=8-5=3

6x=18   x=18:6=3

24:x=6   x=24:6=4

75-x=72    75-72=x    x=3

2x+9=13   2x=13-9     x=4:2=2

15-3x=6    15-6=3x       9=3x      x=9:3=3

Answer 2

Verificam, introducand pe x=3 in fiecare dintre ecuatii
3+5=8 ok
6*3=18 ok
24:3=8≠6, nu verifica
75-3=72, adevar
2*3+9=6+9=15≠13, nu verifica
3*2=6, verifica