Question

2,5x+1=3;x€{1,2,3}
va rog frumos ajutatima e urgent

Answer 1

2,5 x +1=3
2,5 x=3-1
2,5x=2
x= 2:2,5
x=20:25=20/25=4/5 =0,8

daca x=1
2,5 *1+1=2,5+1=3,5
daca x=2
2,5*2+1=5+1=6
daca x=3
2,5*3+1=7,5+1=8,5

Answer 2

$2,5x+1=3 \\ 2,5x=2 \\ x= \frac{2}{2,5} =0,8$
Succes!