SOLUTION: Before solving X + 3Y= 6 and 2X + 4Y= 7 by elimination, it would be helpful to multiply the first equation by what?

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Question 407254: Before solving X + 3Y= 6 and 2X + 4Y= 7 by elimination, it would be helpful to multiply the first equation by what?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

solving by elimination:

X + 3Y= 6 

2X + 4Y= 7



-2X -6Y= -12

 2X +4Y = 7   |Adding the equations after multiplying 1st by -2

    -2Y = -5

      Y = 5/2   

X = 6-3Y = 12/2-15/2

      X = -3/2

CHECKING our Answer***

 2X + 4Y= 7

 -3 + 10 = 7