Find x+2y
1). x+y=10
2). 2x+4y=20

• B) (2) alone is sufficient.
• 13 years agoHelpfull: Yes(15) No(1)
• Ans. x+2y = 10
  
  first equation is x + y = 10 => 2x + 2y = 20
  Second equation is 2x + 4y=20
  These two equation given y = 0 and x = 10.
  So x + 2y = 10
• 13 years agoHelpfull: Yes(6) No(2)
• x+y=10 multiply by 2 then equation becomes
  2x+2y=20 (1) and second eq is 2x+4y=20 so subtracting this from (!) we get y=0
  so x=10
  x+2y =10 ans is (c)
• 13 years agoHelpfull: Yes(0) No(6)
• Both are need at so find two unknown variable we need to have two equations
• 12 years agoHelpfull: Yes(0) No(3)
• A) (1) alone is sufficient.
• 10 years agoHelpfull: Yes(0) No(2)
• 2) is sufficient
  bcoz if 2 is common in eq 2 then x+2y =10 value came
• 10 years agoHelpfull: Yes(0) No(0)