Question

Do this question in your notebook I want answer of Q8 please don't spam​

Answer 1

let x be the number which subtracted from each term in ratio.

$\frac{19 - x}{21 - x} = \frac{7}{8}$

$152 - 8x = 147 - 7x$

$152 - 147 = - 7x + 8x$

$x = 5$

Answer 2

$\textbf{Question = > }$

What number must be subtracted from each term of the ratio 19 : 21 to make it 7 : 8 ?

$\textbf{Answer = > }$

As given ;

→ What number should we subtract from the ratio 19 : 21 so, that it makes 7 : 8.

→ It means that we have to find out a number which should be subtracted from 19 : 21 to make it in the ratio 7 : 8.

Ratio that make 7 : 8 are :- 14 : 16, 21 : 24, 28 : 32 etc.

The nearest one is “14 : 16”

So,

The number which should be subtracted= (19 - 14) and (21 - 16)

Condition is that if both the results are equal then only we can subtract them as told in question.

First result ;

= (19 - 14)

= 5

Second result ;

= (21 - 16)

= 5.

As 5 = 5, they can be subtracted.

$\textbf{So, your answer is :- 5.}$