Processing math: 100%
 
+0  
 
0
444
1
avatar

Real numbers x and y satisfy

x + xy = 250y

x - xy = -240y

 

Enter all possible values of y, separated by commas.

 Jun 3, 2021
 #1
avatar+26397 
+1

Real numbers x and y satisfy
x + xy = 250y
x - xy = -240y

 

My attempt:

 

(1):x+xy=250y(2):xxy=240y(1)+(2):2x=10y|:2x=5yory=x5xy=5(1):x+xy=250y|:yxy+x=2505+x=250x=245y=x5y=2455y=49

 

laugh

 Jun 3, 2021

0 Online Users