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Mathematics 16 Online
OpenStudy (anonymous):

Guys can someone help me?

OpenStudy (anonymous):

An equation is shown below: \[\frac{ 3 }{ 2 }x +\frac{ 7 }{ 2 }=2x\] What is the solution to the equation?

OpenStudy (anonymous):

@pooja195

OpenStudy (anonymous):

Put all the x's on on side. Since 2x is already by itself I would move (3/2)x

OpenStudy (anonymous):

What will that turn the equation into?

OpenStudy (skullpatrol):

Subtract (2/3)x from both did

OpenStudy (anonymous):

\[\frac{ 7 }{ 2 }=2x+\frac{ 3 }{ 2 }x\]

OpenStudy (anonymous):

no it was positive (3/2)x on the other side so you would want to subtract it from both sides

OpenStudy (anonymous):

So it would look like \[7/2 = 2x-(3/2)x\]

OpenStudy (anonymous):

ohh ok

OpenStudy (anonymous):

So what is 2-(3/2)?

OpenStudy (anonymous):

1?

OpenStudy (anonymous):

not quite when subtracting fractions remember to find the common denominator. So 2/1 and 3/2 have a common denominator of 2. So it will essentially be (4/2) - (3/2) = 4-3/2. Which is 1/2

OpenStudy (anonymous):

So on the right side you know have 1/2x

OpenStudy (anonymous):

oh ok

OpenStudy (anonymous):

*now

OpenStudy (anonymous):

wouldn't you have to divide both sides by 1/2?

OpenStudy (anonymous):

Yes and that gives you?

OpenStudy (anonymous):

1 3/4 = x is what I got

OpenStudy (anonymous):

@TheDream are you there?

OpenStudy (anonymous):

not quite remember that dividing by 1/2 is the same as multiplying by 2. So 7/2 *2 equals what?

OpenStudy (anonymous):

I got 7

OpenStudy (anonymous):

Yep that looks about right good job.

OpenStudy (anonymous):

but that's not an answer choice....

OpenStudy (anonymous):

really what are the choices?

OpenStudy (anonymous):

x = 1 x = 3 x = 5 x = 8

OpenStudy (anonymous):

did you write the question correctly?

OpenStudy (anonymous):

yess

OpenStudy (anonymous):

oh wait... no I didnt

OpenStudy (anonymous):

because 7 is definitely the solution to that equation

OpenStudy (anonymous):

the 2 is to the x power

OpenStudy (anonymous):

so it is \[2^x \] not \[2x\]

OpenStudy (anonymous):

and everything else is the same?

OpenStudy (anonymous):

yep

OpenStudy (anonymous):

\[\frac{ 3 }{ 2 }x+\frac{ 7 }{ 2 }=2^{x}\]

OpenStudy (anonymous):

kk just a minute. Way different problem now I know the answer but I want to find a good solution

OpenStudy (anonymous):

Lol ok thank you so much for your help btw :D

OpenStudy (anonymous):

What kind of class is this for?

OpenStudy (anonymous):

Algebra 1 Honors

OpenStudy (anonymous):

I can't seem to solve it analytically but I did find the answer by graphing the function. Or simply by just plugging in the different x's into the equation.

OpenStudy (anonymous):

Try to ask someone else maybe there is a simple solution I am missing but this seems like an extremely messy problem.

OpenStudy (anonymous):

lol thank you anyway :D

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