Question 34
If $2x + 2y = 14$ and $x^2 - y^2 = 21$ then $x - y$ is equal to
(A) 1 (B) 2 (C) 3 (D) 4 (E) -1
(A) 1 (B) 2 (C) 3 (D) 4 (E) -1
MathNet 2015-part-06 — 191 problems (EN–VI) Question 34
Math Olympiad Vault · MathNet 2015-part-06 — 191 problems (EN–VI)