XP Math - Forums - View Single Post - What is the process in Algebra if there are two unknown numbers?
Thread
:
What is the process in Algebra if there are two unknown numbers?
View Single Post
07-30-2007
#
2
cllau74
Guest
Posts: n/a
x+y = 45 ...(1)x/y+y/x= 2.05(x^2+y^2)/xy = 2.05[(x+y)^2-2xy] /xy =2.05(2025 - 2xy) = 2.05xy4.05xy = 2025 xy = 500 ...(2)Solve (1) and (2)x+500/x = 45x^2-45x+500=0(x-25)(x-20) = 0x= 25 or 20y = 20 or 25.
cllau74