jamilabella20

thanks so much for replying iam just curious about how did you set the choice of numbers ? thanks again

Hi in one of the GRE MATH EXAM there is the following question : let x and y be postive intergers such that 3x+7y is divisible by 11. which of the following must also be divisible by 11. option are a- 4x+6y b- x+y+5 c- 9x+4y d- 4x-9y e- x+y-1 please let me know you reasoning thanks a lot