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Best Answer

y=4

x=1

Because:

  • 8x - y = 4
  • 5x + 3y = 17

You can rearrange the first equation to give:

  • y = 8x - 4

And substitute this into the second equation:

  • 5x + 3(8x - 4) = 17

Expanded out:

  • 5x + 24x - 12 = 17
  • 29x - 12= 17
  • 29x = 29

So x=1

And because you know know x you can put that into an equation to find y:

  • y = 8x - 4
  • y= 8 - 4
  • y= 4
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Q: Solve this equation using subtitution 8x subtract y equals 4 and 5x plus 3y equals 17?
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