MaryJaneBarton MaryJaneBarton

24-03-2017
Mathematics

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7x-4y=20 for y when x=3

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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

24-03-2017

the answer to 7x-4y=20 for y when x=3 is y = 25 i think

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