Respuesta :

Correct Question :-

  • If y = - 7 & x = - 21 , determine x when y = 9

Given :-

  • y = - 7
  • x = - 21

We need to find :-

  • When y = 9 find x

Solution :-

Using proportion ,

  • - 7 : - 21 : : 9 : x

By means & extremes ,

=> - 7x = - 21 × 9

=> x = ( - 21 × 9 ) / - 7

=> x = 3 × 9

=> x = 27

Hence , when y = 9 → x = 27