Question

(7) 99x + 101y = 499; 101x + 997 = 501
(8) 49x - 57y = 172; 57x - 499 = 252​

Answer 1

Step-by-step explanation:

99x + 101y =499------- equation 1

101x + 99x = 501--------equation 2

adding equation 1 n 2

99x + 101y = 499

101x + 99y = 501

______________________

200x + 200y= 1000

dividing both side by 200

x + y = 5 ------‐-------- equation 3

subtracting equation 2 from 1

99x + 101y= 499

101x +99y = 501

__________________

-2x + 2y = -2

dividing both sides by -2

x - y = 1 ---------------equation 4

Adding equation 3 n 4

x + y = 5

x - y = 1

____________

2x = 6

x = 3

substituting x =3 in equation 3

3 + y = 5

y = 5 - 3

y = 2

therefore value of x = 3 and value if y = 2

plz mark it as Brainliest

Answer 2

Answer:

Hope it's helpful!!!! for u