(x + 3)y = 14
We just test each option.
A. x = 11, y = 1
(x + 3)y = 14
(7 + 3)*2
10*2
20 = 14 This is not correct, so the option is wrong.
B. x = 11, y = 1
(x + 3)y = 14
(11 + 3)*1
14*1
14 = 14 This is correct, so the option is the correct.
So option B is the correct one. No need to test the other options.
I hope this helps.