Ratio of Income = 9x and 7x

Ratio of expenditure = 4y and 3y

Saving = Income - Expenditure

9x - 4y = 2000

7x - 3y = 2000

9x - 4y = 7x - 3y

2x = y = 2000

y = 2000

x = 1000

Income

9000 and 7000

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Let the income of the persons be 9x and 7x

Let the expenditure of the persons be 4y and 3y.

Now it is given that both of them saves 2000 each.

So

9x-4y = 2000 1..

7x-3y = 2000 2 ..

From 1... x = 2000+4y /9xPutting this value of x in 2....we get 7x* 2000+4y /9x - 3y = 200028y+14000/9 - 3y = 20003y+2000 = 28y+14000/927y+ 18000 = 28y+14000y+14000 = 18000y = 4000So the expenditure of 1st person will be 16000 and 2nd person will be 12000Income = expenditure+savingSo the income of first person will be 16000+2000 = 18000And the income of second person will be 12000+2000 = 14000- 12

9X-4Y=2000 (1)

7X-3Y=2000 (2)

SUBSTITUTION METHOD

9X-4Y=2000

X=2000+4Y/9 (apply X in equation (2) )

7X-3Y=2000

7(2000+4Y/9)-3Y=2000

14000+28Y-27Y=18000

Y=18000-14000= 4000 therefore, (Y=4000)

substitute Y in equation (1)

9X-4y=2000

9X-4(4000)= 2000

9X-16000=2000

9X=2000+16000= 18000

X=18000/9= 2000 therefore, (X=2000)

MONTHLY INCOME -

first person- 9(2000) = 18000

second person - 7(2000) = 14000

7X-3Y=2000 (2)

SUBSTITUTION METHOD

9X-4Y=2000

X=2000+4Y/9 (apply X in equation (2) )

7X-3Y=2000

7(2000+4Y/9)-3Y=2000

14000+28Y-27Y=18000

Y=18000-14000= 4000 therefore, (Y=4000)

substitute Y in equation (1)

9X-4y=2000

9X-4(4000)= 2000

9X-16000=2000

9X=2000+16000= 18000

X=18000/9= 2000 therefore, (X=2000)

MONTHLY INCOME -

first person- 9(2000) = 18000

second person - 7(2000) = 14000

- 16

Dear student,

Let their income is x

their expenditure is y

Now,

Given

Ratio of their incomes 9x & 7x

Ratio of their expenditure 4y & 3y

A. T. Q

Forming equations....

9x - 4y = 2000.............(i)

7x - 3y = 2000............. (ii)

Equating both equation

9x - 4y = 7x - 3y

2x - y= 0

2x = y ..............,..... (iii)

Putting y= 2x in (i)

9x - 4(2x) = 2000

[ x = 2000]

Now their monthly income is....

9*2000 = RS 18000 &

7*2000 = RS 14000 respectively

Thanks & Regards

Let their income is x

their expenditure is y

Now,

Given

Ratio of their incomes 9x & 7x

Ratio of their expenditure 4y & 3y

A. T. Q

Forming equations....

9x - 4y = 2000.............(i)

7x - 3y = 2000............. (ii)

Equating both equation

9x - 4y = 7x - 3y

2x - y= 0

2x = y ..............,..... (iii)

Putting y= 2x in (i)

9x - 4(2x) = 2000

[ x = 2000]

Now their monthly income is....

9*2000 = RS 18000 &

7*2000 = RS 14000 respectively

Thanks & Regards

- 0

9X-4Y=2000 (1)

7X-3Y=2000 (2)

SUBSTITUTION METHOD

9X-4Y=2000

X=2000+4Y/9 (apply X in equation (2) )

7X-3Y=2000

7(2000+4Y/9)-3Y=2000

14000+28Y-27Y=18000

Y=18000-14000= 4000 therefore, (Y=4000)

substitute Y in equation (1)

9X-4y=2000

9X-4(4000)= 2000

9X-16000=2000

9X=2000+16000= 18000

X=18000/9= 2000 therefore, (X=2000)

MONTHLY INCOME -

first person- 9(2000) = 18000

second person - 7(2000) = 14000

thanks

7X-3Y=2000 (2)

SUBSTITUTION METHOD

9X-4Y=2000

X=2000+4Y/9 (apply X in equation (2) )

7X-3Y=2000

7(2000+4Y/9)-3Y=2000

14000+28Y-27Y=18000

Y=18000-14000= 4000 therefore, (Y=4000)

substitute Y in equation (1)

9X-4y=2000

9X-4(4000)= 2000

9X-16000=2000

9X=2000+16000= 18000

X=18000/9= 2000 therefore, (X=2000)

MONTHLY INCOME -

first person- 9(2000) = 18000

second person - 7(2000) = 14000

thanks

- 1