anonymous
  • anonymous
Solve for x: 4 over 5 x + 4 over 3 = 2x x = __________________ Write your answer as a fraction in simplest form. Use the "/" symbol for the fraction bar.
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
halp
anonymous
  • anonymous
like this?\[\frac{ 4 }{ 5x } +\frac{ 4 }{ 3 } = 2x\]
anonymous
  • anonymous
I guess, it says solve for x

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anonymous
  • anonymous
i know solve for x, but we need to get the equations right first
anonymous
  • anonymous
oh right lol, sorry im like so out of it when it comes to math Its x=4/5 x + 4/3 = 2x
anonymous
  • anonymous
the x is separate
anonymous
  • anonymous
ok lets multiply by 3 on both sides to remove the denominator on the 4/3
anonymous
  • anonymous
\[(3)\frac{ 4 }{ 5x } + (3) \frac{ 4 }{ 3 } = (3)2x\]
anonymous
  • anonymous
2.4 x + 4 =6x is that right?
anonymous
  • anonymous
where did you get the 2.4x?
anonymous
  • anonymous
3 times 4/5
anonymous
  • anonymous
its 3 times 4/5x
anonymous
  • anonymous
12/5x you cant just pull the x out
anonymous
  • anonymous
i told you that the x was separate though
anonymous
  • anonymous
\[\frac{ 4 }{ 5 }x\]
anonymous
  • anonymous
like this?
anonymous
  • anonymous
ye
anonymous
  • anonymous
\[2.4x + 4 = 2x\] now minus 2x from both sides
anonymous
  • anonymous
0.4x + 2x
anonymous
  • anonymous
or 0.4 + 2x = 2x
anonymous
  • anonymous
\[2.4x + 4 -2x = 2x - 2x\]
anonymous
  • anonymous
so would 2x -2x or just 2x be the answer..?
anonymous
  • anonymous
solve that chunk first
anonymous
  • anonymous
2x-2x is definitely 0
anonymous
  • anonymous
XD ye ik i got 4.4?
anonymous
  • anonymous
2.4x-2x =?
anonymous
  • anonymous
well that would be 0.4 but i added the 4 cuz u said it up there
anonymous
  • anonymous
its 2.4x + 4
anonymous
  • anonymous
not 2.4x +4x
anonymous
  • anonymous
you can't add the variables and the constants together
anonymous
  • anonymous
ok then 6.4?
UsukiDoll
  • UsukiDoll
"you can't add the variables and the constants together " leave it as 2.4x + 4
anonymous
  • anonymous
2.4x + 4
anonymous
  • anonymous
2.4 is a coefficient not a constant term
anonymous
  • anonymous
so we now have \[0.4x + 4 = 0\]
anonymous
  • anonymous
so that would be the final answer?
UsukiDoll
  • UsukiDoll
ick decimals... I would multiply the whole equation by 10 and then solve for x
anonymous
  • anonymous
yes multiply by 10
UsukiDoll
  • UsukiDoll
decimals are evil. we use multiplication to modify the equation and make life easier.
anonymous
  • anonymous
hint: calculator doesn't care about decimals
anonymous
  • anonymous
waddaya got?
UsukiDoll
  • UsukiDoll
ghostbusters.
anonymous
  • anonymous
you seen the goat balls yet?
UsukiDoll
  • UsukiDoll
ya ._,
anonymous
  • anonymous
lel
anonymous
  • anonymous
Um...so the answer is..0.4x + 4 = 0 also, goat...wtf...
anonymous
  • anonymous
correct?
UsukiDoll
  • UsukiDoll
gotta solve for x =_= that's just an equation
anonymous
  • anonymous
thats not your final answer
anonymous
  • anonymous
show it to him if he didn't finish it in 10mins
UsukiDoll
  • UsukiDoll
k/
UsukiDoll
  • UsukiDoll
so first we multiply the entire equation by 10 because dealing with decimals (especially by hand) is torture 0.4x + 4 = 0 (10)(0.4x)+4(10)=0(10) 4x+40=0 now we need x by itself. We don't want that 40 on the left side, so subtract 40 on both sides finally divide both sides by 4
anonymous
  • anonymous
\[4x + 40 =0\]\[x + 10 -10 = 0 - 10\]

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