Question

x^2+xy= 15 y^2+xy=10 find x

Answer 1

Hi friend ✋

x² + xy = 15

x × ( x + y ) = 15

x + y = 15/x

--------------

y² + xy = 10

y × ( y + x ) = 10

x + y = 10/y

-------------

15/x = 10/y

y = 10x/15

--------------

x × ( x + y ) = 15

x × ( x + 10x/15 ) = 15

x × ( 25x/15 ) = 15

25x² = 225

x² = 225/25 = 9

x = 3

hope it helps