anonymous
  • anonymous
I need help solving 5y-3/5=4/5, 11z/16+7z/8=5/16, a/20+4/15=9/15
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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LynFran
  • LynFran
lets start with the 1st equation 5y-3/5=4/5
LynFran
  • LynFran
whats the first step?
anonymous
  • anonymous
adding 3/5 to each side?

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More answers

LynFran
  • LynFran
yes we can... we can also multiply the equation throughout by 5 leaving |dw:1442965991929:dw|
LynFran
  • LynFran
now we add 3 to both sides we get 25y=7 y=7/25 in a similar way if we work its as it is we would get the same answer ..here |dw:1442966307794:dw|
anonymous
  • anonymous
a little confusing but I get it
LynFran
  • LynFran
ok any question before moving onto the 2nd problem ? |dw:1442966674753:dw|
anonymous
  • anonymous
no
LynFran
  • LynFran
ok we must first find the LCM
LynFran
  • LynFran
lowest common multiple
anonymous
  • anonymous
16?
LynFran
  • LynFran
|dw:1442966977110:dw|
LynFran
  • LynFran
8 into 16=2 so 2*7z=14z
LynFran
  • LynFran
now 11z+14z=??
anonymous
  • anonymous
24z
LynFran
  • LynFran
|dw:1442967219579:dw|multiply both sides by 16...we get 24z=5
LynFran
  • LynFran
whats the next step??
anonymous
  • anonymous
divide each side by 24
LynFran
  • LynFran
correct
anonymous
  • anonymous
so z equals 4.8?
anonymous
  • anonymous
or is it 0.21
LynFran
  • LynFran
wait we made an error 11+14=25 and not 24
anonymous
  • anonymous
oh
LynFran
  • LynFran
|dw:1442967606687:dw|
LynFran
  • LynFran
so 25z=5
anonymous
  • anonymous
so z equals 0.2 then
LynFran
  • LynFran
correct or 1/5 in fraction form
LynFran
  • LynFran
|dw:1442967739184:dw|what a=?
anonymous
  • anonymous
yep
anonymous
  • anonymous
a equals 1.8?
LynFran
  • LynFran
nope
anonymous
  • anonymous
im lost
LynFran
  • LynFran
|dw:1442968005511:dw|
anonymous
  • anonymous
so a equals 1/3
LynFran
  • LynFran
no 20/3
anonymous
  • anonymous
oh
LynFran
  • LynFran
yep

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