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kryton1212

The x-coordinate of the point of intersection of the straight lines 2x+ay-7=0 and ax-y-5=0 is 2. If a is an integer, find the value of a.

  • one year ago
  • one year ago

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  1. RolyPoly
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    2x+ay-7=0 -(1) ax-y-5=0 -(2) From the second equation: y = ax-5 -(3) Sub. (3) into (1) 2x+a(ax-5)-7=0 -(4) Sub x=2 into (4), then solve a I think it should work.

    • one year ago
  2. kryton1212
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    is it 3?

    • one year ago
  3. kryton1212
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    thank you I got it:)

    • one year ago
  4. RolyPoly
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    I think so!

    • one year ago
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