Ahmad K.

asked • 11/17/13# Please see the bellow simulteneaus equation and help me please. I am confused. Thanks in advance.

20x-y=5

x+5y=10

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## 2 Answers By Expert Tutors

20x-y=5

x+5y=10

x+5y=10

100x-5y=25

x+5y=10

101x=35

x=35/101

substitute in second equation

substitute in second equation

35/101+5y=1010/101

5y=975 /101

y=195/101

What is the obsession with approximate answers when accurate ones are easily available?

Kay H.

Yes, I noticed that and changed it before I submitted but somehow the previous answer is the one that got posted. Not sure how that happened.

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11/18/13

Kay H. answered • 11/17/13

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20x-y=5

x=10-5y

20(10-5y)-y=5

200-100y-y=5

200-101y=5

-101y=5-200

-101y=-195

y=195/101=1.93

20x-1.93=5

20x=6.93

x=6.93/20 =0.347

Michael F.

tutor

200-100y-y=5 is 200-101y=5

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11/17/13

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