just checking if this is right.

- Gokuporter

just checking if this is right.

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- Gokuporter

|dw:1449735632440:dw|

- MD152727

Here

##### 1 Attachment

- Gokuporter

why didn't you cross multiply??

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## More answers

- Gokuporter

@MD152727

- MD152727

I did it in my own way, ethier is fine

- UsukiDoll

there are more than one ways to solve an equation as long as you're not breaking the math rules

- MD152727

Yep

- UsukiDoll

you can either split the equation up on the right hand side and then simplify...continue from there or cross multiply ... though in this case I think cross multiply may be easier XD

- UsukiDoll

but I see a mistake
7 x 18 = 126

- UsukiDoll

and another one... a distribution error

- Gokuporter

ohh i see what i did wrong now

- UsukiDoll

|dw:1449736419019:dw|

- UsukiDoll

I will use the equation tool
\[\huge 8(x+4) = 7 \cdot 18\]

- UsukiDoll

\[\huge 8 \cdot x + 8 \cdot 4 = 126\]
\[\huge 8 x + 32 = 126\]
now subtract 32 on both sides
and divide both sides by 8

- UsukiDoll

\[\huge 8 x + 32-32 = 126-32\]
\[\huge 8 x = 94\]
\[\huge x = \frac{94}{8}\]
we can reduce this fraction further because both are divisible by 2
\[\huge x = \frac{47}{4}\]

- UsukiDoll

pfttt to check this will require some work on the right hand side of the equation.. this is gonna be a killer XD

- UsukiDoll

|dw:1449736759342:dw|

- UsukiDoll

|dw:1449736808780:dw|

- UsukiDoll

then we got to flip the second fraction which is that 18 because we can't divide fraction s

- UsukiDoll

|dw:1449736867843:dw| now we can reduce this fraction

- UsukiDoll

because both numbers are divisible by 9, thank goodness this is over! we got 7/8!!!!|dw:1449736928684:dw|

- Gokuporter

Thank you for your help i understand how to do it now

- UsukiDoll

:)
my drawings don't look that messed up do they? I kind of became sloppy when I did the check

- Gokuporter

i can read them fine so no

- anonymous

X= 7/8 - 4/18 then do the rest

- UsukiDoll

hmm I'm curious at something... that technique from earlier. I'm gonna do it on paint and post it here. because should the fraction be split up it's x/18+4/18 which the poster forgot to do.

- Gokuporter

idk i wouldn't split it up

- anonymous

x=7/8 - 4/18
x=(63-16)/72
x=47/72

- UsukiDoll

the denominator has just a single digit.. so it can be split. and even wolfram agrees with me. See attachment with the stuff I borrowed from another user shortly. In the meantime http://www.wolframalpha.com/input/?i=solve+7%2F8+%3D+%28x%2B4%29%2F18

- UsukiDoll

##### 1 Attachment

- UsukiDoll

so although the other user split the fraction correctly, he dropped the 18
so the fraction should have been x/18 , not x

- UsukiDoll

by poster in an earlier comment I meant the user with the owl... there was an 18 that was dropped

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