Given that 2x + y = 7 and 3x – 2y = 3, by how much is 7x greater than 10?

A. 1
B. 3
C. 7
D. 17

Correct Answer: Option C

C. 7

Explanation
2x + y = 7…(1)

3x – 2y = 3…(2)

From (1), y = 7 – 2x for y in (2)

3x – 2(7 – 2x) = 3

3x – 14 + 4x = 3

7x + 3 + 14 = 17

x = 17/7

Hence, 7 x 17/7

= 17 – 10

= 7