If 2x-y=4 then 6x-3y=? (a)15 (b)12 (c)18 (d)10

• 2x-y=4
  3*2x-3*y=3*4
  6x-3y=12
  so answer is (b)
• 12 years agoHelpfull: Yes(6) No(0)
• 2x-y = 4
  
  multiply with 3 on both sides
  
  3(2x-y) = 3*4
  6x-3y = 12
  Ans is B
• 12 years agoHelpfull: Yes(3) No(0)
• 2x-y=4......1
  6x-3y=?.....2
  by compare 1,2
  first eqn multify with 3 then it equal to 2nd eqn
  so..3(2x-y=4)=6x-3y=12
  then answer is 12
• 12 years agoHelpfull: Yes(3) No(0)
• Option B 12
  
  x=4+y/2
  6(4+y/2)-3y=12
• 12 years agoHelpfull: Yes(2) No(0)
• b) 12
  
  Put x= 3 and y = 2.
  
  6(3)-3(2)= ??
  18-6= 12
  
• 12 years agoHelpfull: Yes(2) No(0)
• 6x-3y
  => 3(2x-y)
  => 3*4
  => 12
  
• 12 years agoHelpfull: Yes(1) No(0)
• b)12
  3(2x-y)=6x-3y=12
• 12 years agoHelpfull: Yes(0) No(0)
• given 2x-y=4 => y=2x-4 put this in second eq then 6x-(2x-4)=0 =>4x=-4=>x=-1 and substitute x=-1 in 2x-y=4 then y=2 then 6x-3y=6(-1)-3(2)=-6-6=12
• 11 years agoHelpfull: Yes(0) No(0)
• multiply the equation with 3
  answer:12
• 11 years agoHelpfull: Yes(0) No(0)
• 2x-y=4 6x-3y=12 eq 2 multiply by 2
• 11 years agoHelpfull: Yes(0) No(0)
• Ans=12
  2x-y=4.....(1)
  now (1)*3 is 6x-3y=12
• 11 years agoHelpfull: Yes(0) No(0)
• 2x-y=4
  y=4-2x....sub y value in 6x-3y
  
  6x-3(4-2x)
  6x-12+6x
  6x-6x=12
  anus=12
• 11 years agoHelpfull: Yes(0) No(0)
• 6x-3y
  => 3(2x-y)
  => 3*4
  => 12
• 10 years agoHelpfull: Yes(0) No(0)
• multiply eq with 3 we get 12 as the answer
• 10 years agoHelpfull: Yes(0) No(0)