# Thread: Equations: Where am I going wrong?

1. ## Equations: Where am I going wrong?

2x/3-x/4=5
*12=

3*4*2x/3=8x

3*4*x/4=3x

5*12=60

8x-3x=60

5x=60

/5=x=12

Help! I got 12 but it doesn't seem to fit in. Unless I'm just being stupid :/

And this one:

2x-1/6+x+3/3=5/2

*6=1*6*2x-1/2=2x-1

2*3*x+3/3=2x+6

2*3*5/2=15

=4x+5=15

-5=4x=10

/4=x=2.5

Thanks

Laura

2. Originally Posted by Turple
2x/3-x/4=5
*12=

3*4*2x/3=8x

3*4*x/4=3x

5*12=60

8x-3x=60

5x=60

/5=x=12

Help! I got 12 but it doesn't seem to fit in. Unless I'm just being stupid :/

And this one:

2x-1/6+x+3/3=5/2

*6=1*6*2x-1/2=2x-1

2*3*x+3/3=2x+6

2*3*5/2=15

=4x+5=15

-5=4x=10

/4=x=2.5

Thanks

Laura
I assume you mean: $\frac{2x}{3} - \frac{x}{4} = 5$

$12 ( \frac{2x}{3} - \frac{x}{4} ) = 12( 5 )$

$8x - 3x = 60$

$5x = 60$

$x = 12$ (You were correct! Good Job)

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Second one:

2x-1/6+x+3/3=5/2

$\frac{2x - 1}{6} + \frac{x + 3}{3} = \frac{5}{2}$

$6 (\frac{2x - 1}{6} + \frac{x + 3}{3}) = 6( \frac{5}{2} )$

$2x - 1 + 2(x + 3) = 15$

$4x + 5 = 15$

$x = 2,5$ (Correct again! Seems like you got the idea! )

3. ## Xd

Oh ok thanks I guess I just wasn't checking them properly.

4. Originally Posted by Turple
Oh ok thanks I guess I just wasn't checking them properly.
You're welcome. You seem to have it all under control