anonymous
  • anonymous
5/-8 + -6/5???? HELP!!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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dumbcow
  • dumbcow
find the common denominator...just like you've done before
anonymous
  • anonymous
i dont know how to find the common denominator
anonymous
  • anonymous
:(

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dumbcow
  • dumbcow
its the LCM of 8 and 5
anonymous
  • anonymous
how do u find the LCM?
dumbcow
  • dumbcow
8+8+8+8+8 5+5+5+5+5 when do they meet?
anonymous
  • anonymous
7
anonymous
  • anonymous
??
anonymous
  • anonymous
now what do i do with it??
dumbcow
  • dumbcow
8+8=16+8=24+8=32+8=40 5+5=10+5=15+5=20+5=25+5=30+5=40 they meet at 40 or 8*5 that is now our new denominator, but we have to change numerators so they are equivalent -5/8 = -25/40 i multiplied both top and bottom by 5 -6/5 = -48/40 multiply top and bottom by 8
dumbcow
  • dumbcow
once you have the new fractions with same denominator just add the top numbers -25 + -48 = -73 = -73/40
anonymous
  • anonymous
ohhh okk
anonymous
  • anonymous
that was right! ok last one!
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dumbcow
  • dumbcow
if you have to just multiply the bottom numbers, that will always give you a common denominator
dumbcow
  • dumbcow
always look for 2 neg signs next to each other, they cancel each out do this first
dumbcow
  • dumbcow
do you want an explanation or just the answer
dumbcow
  • dumbcow
61/18

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