0 votes 0 votes The total number of integer pairs $(x,y)$ satisfying the equation $x+y=xy$ is $0$ $1$ $2$ None of these Quantitative Aptitude cat2004 quantitative-aptitude algebra + – go_editor asked Jan 12, 2016 edited Mar 30, 2022 by Lakshman Bhaiya go_editor 13.8k points 565 views answer comment Share See all 0 reply Please log in or register to add a comment.
2 votes 2 votes x+y=xy or, x+y-xy=0 Subtracting 1 on both sides, x+y-xy-1 = -1 or, x(1-y)-1(1-y) = -1 or, (x-1)(1-y) = -1 So, total integer pairs are (2,2) and (0,0) Shweta Nair answered Oct 6, 2017 Shweta Nair 134 points comment Share See all 0 reply Please log in or register to add a comment.