anonymous
  • anonymous
solve the equation (7a/3a+3)-(5/4a-4)=(3a/2a+2)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
Is this the equation? \[\frac{ 7a }{ 3a+3 } - \frac{ 5 }{ 4a-4 } = \frac{ 3a }{ 2a+2 }\]
anonymous
  • anonymous
yes
anonymous
  • anonymous
a=3, a=-1/2

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anonymous
  • anonymous
can you show me how you got those answers please
anonymous
  • anonymous
multiply 12 both side
anonymous
  • anonymous
take the right term to left and second term on the left to right..
anonymous
  • anonymous
\[\frac{ 28a }{ a+1 } - \frac{ 18a }{ a+1 }=\frac{ 15}{ a-1 }\]
anonymous
  • anonymous
\[\frac{ 10a }{ a+1 } =\frac{ 15}{ a-1 }\]
anonymous
  • anonymous
\[\frac{ 2a }{ a+1 } =\frac{ 3}{ a-1 }\]
anonymous
  • anonymous
\[2a(a-1)=3(a+1) \]
anonymous
  • anonymous
2a^2-2a=3a+3 2a^-5a-3=0 (2a+1)(a-3)=0 a=3 a=-1/2
anonymous
  • anonymous
ok thank you i got it can you help me with this one 1=(1/1-a)+(a/a-1)
anonymous
  • anonymous
i don't understand why you times everything by 12? I get that it's the least common denominator so are you trying to find the least common denominator of the numbers that have a variable after them or what?
anonymous
  • anonymous
yes 12 is the lcm of 2,3,4. you don't need to do that, but this is one way to solve it and it makes our job easier, at least for me..

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