Question

2x + 1=9
Ajutatima trebuie aflat x-ul

Answer 1

$\displaystyle 2x+1=9 \\ 2x=9-1 \\ 2x=8 \\ x= \frac{8}{2} \\ x=4$

Answer 2

2x+1=9
9-1:2=x
8:2=4 => x=4
Verificare
2x4+1= 8+1 = 9