Question

numerele 5 si 10 sunt invers propotionale cu numerele 8 su b

Answer 1

( 5 ; 10 ) i.p ( 8 ; b )

8 × 5 = 10b

40 = 10b

b = 4

Answer 2

$\frac{ \frac{5}{1} }{8 } = \frac{ \frac{10}{1} }{b} = > 5 \times \frac{8}{1} = 10 \times \frac{b}{1} = >$
$40 = 10 \times b$
b=4