Question

solve the equation simultaneously 49×-57Y=172,57x-49 y=252



​

Answer 1

Step-by-step explanation:

49x - 57y = 172 ( 1)

57x - 49y = 252 ( 2)

substracting 2 ,1

52x - 47y = 252

49x - 57y = 172

‐------------------

x+ y = 10

Adding 2 ,1

57x +47y = 252

49x-57y = 172

-----------------

x - y = 4

Adding 3, 4

x+y = 10

x-y = 4

x= 7

put x= 7 ln 3

x+y = 10

7+y =10

y = 3