Ask a New Question
Search
Questions and answers by
Gwyneth Skylar
Answers (1)
X+Y=20 OR X=20-Y X^2-Y^2=120 (20-Y)^2-Y^2=120 400-40Y+Y^2=120 -40Y=120-400 -40Y=-280 Y=-280/-40 Y=7 ans. X+7=20 X=20-7 X=13 ans. Proof: 13^2-7^2=120 169-49=120 120=120
