MaryJaneBarton
MaryJaneBarton MaryJaneBarton
  • 24-03-2017
  • Mathematics
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7x-4y=20 for y when x=3

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Vika11
Vika11 Vika11
  • 24-03-2017
I think it is y=-.25
7*3 - 4y = 20
21 - 4y = 20
subtract 21 from each side
- 4y = - 1
divide each side by - 4
y= -.25
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nightmist
nightmist nightmist
  • 24-03-2017
 the answer to 7x-4y=20 for y when x=3 is y = 25 i think 
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