Question

3x-5y=5000
4x-7y=5000​

Answer 1

Answer:

Income -expenditure =savings

income of A =3x

income of B=4x

expenditure of A=5y

expenditure of B =7y

savings of A and B =5000

3x-5y =5000—————1

4x-7y =5000——————2

from equation 1 and 2

12x-20y=20000

12x-21y=15000

—————————

y. = 5000

—————————

y=5000

substitute in equation 1

3x-5y =5000

3x-5(5000)=5000

3x-25000 =5000

3x=30000

x=10000

annual income of A =3x

=3(10000)

=30000

ANNUAL INCOME OF B =4(10000)

=4000

Step-by-step explanation:

PLZ MARK ME AS A BRAINLIST

Answer 2

Answer:

x = 10000, y = 5000

Step-by-step explanation:

3x-5y=5000_____(1)

4x-7y=5000_____(2)

Subtracting eq. 1 and 2

-x + 2y = 0

-x = -2y

x = 2y

Putting value of x in eq. 1

3x - 5y = 5000

3×2y - 5y = 5000

6y - 5y = 5000

y = 5000

Finding value of x

x = 2y

x = 2×5000

x = 10000