Question

Given that 4x−5y=39

Find y when x=3
Give your answer as an improper fraction in its simplest form.


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Answer 1

-27/5 or -5 2/5

Explanation:

4x-5y=39 while x=3

4(3)-5y=39 add x into bracket

12-5y=39 result of 4*3

12-5y-12=12-39 substrate non variable number to each side

5y = -27 the result from upper substraction

y= -27/5 the result mixed fraction form -5 2/5

Answer 2

-
`(27)/(25\\)`

Explanation:

4x−5y=39

for x=3

12 - 5y = 39

-5y = 39 -12

-5y =
`(27)/(5\\)`

-y =
`(27)/(25\\)`

y = -
`(27)/(25\\)` = -1
`(2)/(25\\)\\`