In each of the following questions two equations are given. Solve these equations and give answer:

Correct option is D

I: 3x + 7y = 96
3x = 96 – 7y
x = (96 – 7y)/3
II: 9x – 4y = 63
9 × {(96 – 7y)/3} – 4y = 63
864 – 63y – 12y = 189
75y = 675
y = 9
Now x = (96 – 7 × 9)/3
x = 33/3 = x = 11