SOLUTION: 3x-5y=900 ,5x-9y=1300 then x=? and y = ?
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Question 992992: 3x-5y=900 ,5x-9y=1300 then x=? and y = ?
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
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Multiply first equation by 5 and the second equation by -3. Then add. You will get
-25y + 27y = 5*900 -3*1300,
2y = 4500 - 3900 = 600.
y = 300,
x = = = 800.
Answer. x = 800, y = 300.
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