(x+3)(y+7)=(x+5)(y+4)2y(5x+4)=(2x+1)(5y+2)
x-x-5x-2x+y-y-2y+5y=3+7+5+4+4-1-2
-7x+3y=20
-4xy=20 |:(-4)
xy=-5
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
(x+3)(y+7)=(x+5)(y+4)2y(5x+4)=(2x+1)(5y+2)
x-x-5x-2x+y-y-2y+5y=3+7+5+4+4-1-2
-7x+3y=20
-4xy=20 |:(-4)
xy=-5