Question

determinati nr necunoscut din proportia x+2 supra 3=16 supra 9

Answer 1

(x+2)9=3 ori 16 
9x+18=48
9x=48-18=30
x=30 supra 9
x= 10 supra 3

Answer 2

    
$\frac{x+2}{3} = \frac{16}{9} \\ 9(x+2)=3*16 \\ 9x+18=48 \\ 9x=48-18 \\ 9x=30 \\ x= \frac{30}{9} = \boxed{\frac{10}{3}}$