Question

if 49x-57y=172 and 57x-49y=252 then x+y=?​

Answer 1

Answer:

49x-57y=172

57x-49y=252

subtracting,

49x-57x-57y+49y=172-252

=> -8x-8y= -80

=> -8(x+y)= -80

=> x+y= -80/-8

=> x+y=10

so,

x+y=10

Answer 2

Answer:

ok take your time and thanks ok