Question

the sum of two is 30 and their difference is 12 find the ratio of those numbers​

Answer 1

Answer:

Let the numbers be 'x' and 'y'

x+y=30-------(1)

x-y=12--------(2)

Add (1) and (2),

2x=42

x=21

Substitute the value of x in eq(1)

21+y=30

y=30-21

y=9.

Their ratio=x/y=21/9=7/3.

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Step-by-step explanation:

Answer 2

Answer:

Let numbers are x and y then

x + y = 30

x= 30 - y ____eqn (1)

Also let x is greater than y then

x - y = 12

Putting eqn(1) here in place of x

30 - y -y = 12

-2y = 12 - 30

-2y = -18

2y = 18

y = 9

Now putting y =9 in eqn (1)

x= 30 - 9

x= 21

The numbers are 21 and 9

Ratio of numbers= 21 / 9

= 7 / 3

Ratio of numbers is 7 : 3