Question

20
Two numbers are in the ratio 8:3. I
the sum numbers is 143,f nd the
numbers.
(1 Point
*2/3 of number is 20 less than the original number . find the number​

Answer 1

Answer:

let the nos be = 8x and 3x

so 8x+3x= 143

= 11x = 143

x= 13

so 8x= 13*8= 108

3x= 39

let the no be x

2/3 x= x-20

-x = 30

x= -30

Answer 2

Q:- Two nos. are in the ratio 8:3. The sun of the no.s = 143, Find the nos.

Sol:- Let the nos. be 8x and 3x

⇒ 8x + 3x = 143

⇒ 11x = 143

⇒ x = 143/11

⇒ x = 13

8x = 8 × 13 = 104

3x = 3 × 13 = 39

Hence, the nos. are 104 and 39

Q:- 2/3 of number is 20 less than the original number. Find the number.

Sol:- Let the no. be x

$\frac{2}{3} x = x - 20 \\ \\ 20 = x - \frac{2}{3} x \\ \\ 20 = \frac{3x - 2x}{3} \\ \\ 20 = \frac{1}{3}x \: \: \: \: \: \: \: \: \: \\ \\ \frac{20}{ \frac{1}{3} } = x \: \: \: \: \: \: \: \: \: \: \: \\ \\ 20 \times 3 = x \: \: \: \: \: \\ \\ 60 = x \: \: \: \: \: \: \: \: \: \: \:$

or x = 60

_______________________________♡