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x + 2y = -1 5x - 4y = 16

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1 Answer

Hi Zack,
 
x+2y=-1........eq 1
5x-4y=16........eq 2
 
Multiply eq 1 by 2, we get
2x+4y=-2
5x-4y=16
adding these equations,
7x=14
x=2
substituting value of x=2 in eq 1,
2+2y=-1
2y=-3
y=-3/2
check: x+2y=2+2(-3/2)=2-3=-1.
          It satisfies the equation 1.
Ans: x=2, y=-3/2
 
Meena from Strongsville,OH.