Mathematics
21 Online
OpenStudy (anonymous):
7y+4/y+2=-4/3
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OpenStudy (saifoo.khan):
\[\frac{7y+4}{y}+2 = \frac{-4}{3}\]
this?
OpenStudy (anonymous):
yep
OpenStudy (saifoo.khan):
\[\frac{7y+4}{y} = \frac{-4}{2}-2\]
OpenStudy (saifoo.khan):
\[\frac{7y+4}{y} = \frac{-4-2}{2}\]
OpenStudy (saifoo.khan):
\[Cross-multiply\]
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OpenStudy (anonymous):
how did u get -2 there
OpenStudy (saifoo.khan):
\[{2(7y+4)} = {y(-6)}\]
OpenStudy (saifoo.khan):
14y + 8 = -6y
8y = -8
y = -1
OpenStudy (anonymous):
sorry wrong ans
OpenStudy (anonymous):
its not -1
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OpenStudy (anonymous):
(7y+4)/y=-4/3-2
=-4/3-6/3
=-10/3
(7y+4)/y=-10/3
cross multiply
3(7y+4)=-10y
21y+12=-10y
21y+10y=-12
31y=-12
y=-12/31
OpenStudy (anonymous):
sorry this is also a wrong ans
OpenStudy (saifoo.khan):
O, let me solve this again on my book, just a Sec.
OpenStudy (anonymous):
at seemaarulzz, are you tellin zat the ans -12/31 is wrong
OpenStudy (anonymous):
it cant be wrong unless the equation which saifoo give is not the correct one
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OpenStudy (saifoo.khan):
seemaru, please check your equation again.. & post a picture of that ques.
OpenStudy (anonymous):
sorry its from my book n the equation is right.....ans is y=-4/5
OpenStudy (anonymous):
i geuss there has been typing mistakes in you book otherwise if y=-4/5 then the rite handside of the equation should be 4
OpenStudy (saifoo.khan):
Yeas!