Question

http://prntscr.com/9nbod5

Answer 1

\[\frac{ 15 }{ 21 } = \frac{ 5 }{ x } \]

do you notice any relation between 15 and 5?

Answer 2

they both are in 5

Answer 3

good and also 15 is the product when you multiply 5x3

Answer 4

since we know that to get from 15 to 5 we need to divide by 3 \((15 \div 3 = 5)\), we can do the same thing with 21 (\(21 \div 3 = ?\))

Answer 5

7

Answer 6

correct so \(x = 7\) !

Answer 7

ty

Answer 8

yw!