প্রশ্ন: x + 4y = 11, 7x - 3y = 15 হলে (x, y) এর মান কত?

সমাধান:
x + 4y = 11................(1)
7x - 3y = 15................(2)

(1) × 3 + (2) × 4 ⇒
3x + 12y + 28x - 12y = 33 + 60
31x = 93
x = 93/31
x = 3

(1) ⇒
x + 4y = 11
3 + 4y = 11
4y = 8
y = 2

(x, y) = (3, 2)