Solve for x.
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- anonymous

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- anonymous

@Nnesha i think its 8

- Nnesha

substitute x value to check ur answer
if both sides are equal then 8 is right

- anonymous

oh alright

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## More answers

- anonymous

2 x 8 - 4 like that?

- Nnesha

|dw:1434465604776:dw|
just like this

- Nnesha

yep right first multiply and then subtract

- anonymous

its not right, cause 2(8) -4 = 12 and 2(8) = 16

- Nnesha

yes right both sides are not equal btw you should reduce the fraction
but in this case nope 8 is not correct

- Nnesha

same like previous one cross multiply :-)

- anonymous

|dw:1434465831423:dw| thats what i did to get 8

- Nnesha

alright thanks for showing work i appreciate now easy to start :-) |dw:1434465966222:dw|
supposed to be \[\huge\rm 2x(10) =20(2x-4)\]

- Nnesha

|dw:1434466031483:dw|

- anonymous

Ohhh alright so 20x = (2x - 4)

- Nnesha

\(\color{blue}{\text{Originally Posted by}}\) @Acceptfully
Ohhh alright so 20x = (2x - 4)
\(\color{blue}{\text{End of Quote}}\)
|dw:1434466187130:dw|
20(2x-4)
remember cross multiply
now distribute parentheses by 20

- anonymous

is the blue 2x x 10

- Nnesha

yes right 2x times 10 :-)

- anonymous

2x(10) =20x right

- Nnesha

yes right

- anonymous

20 (2x - 4)
_4 -4
16 0
right?

- anonymous

or did i do it completely wrong

- Nnesha

nope nope 20(2x-4) is same as 20 Times (2x-4)
so multiply everything which is inside the parentheses by outside term

- Nnesha

\[\huge\rm \color{reD}{20}(2x-4) = \color{reD}{20} \times 2x - \color{red}{20 }\times 4\]

- anonymous

20 x 2x = 40x and 20 x 4 = 20 so 40x - 20 would equal 20x right

- Nnesha

40x is right but 20 times -4 =what ?

- anonymous

-80

- Nnesha

yes so \[\huge\rm 20x=40x-80\]
now solve for x :-)

- anonymous

|dw:1434466742176:dw| like that?

- Nnesha

nope you can't combine 20X and -80 there are not LIKE terms
so move 40x to the left side so you can combine 2x and 40x

- anonymous

|dw:1434466920771:dw|

- Nnesha

yep right \[-20x=-80\]
LAST STEp solve for x!

- anonymous

i forgot, do i divided -20x by 2, i forgot

- Nnesha

goal is to isolate x
so u need to cancel out -20 from left side :-)

- anonymous

|dw:1434467130802:dw| like tht or something

- Nnesha

nope it's -20 TIMES X
so do opposite of multiplication to cancel out -20 from left side

- anonymous

|dw:1434467252579:dw| im sorry, is this how? im confused

- Nnesha

\[\frac{ -20x }{ ?}= \frac{ -80 }{ ?}\]
remember opposite of multiplication is division
so you should divide sides by ... ?/

- Nnesha

goal is to isolate x!!! :-)

- anonymous

but how do i isolate x

- Nnesha

divide both sides by -20

- Nnesha

you need x itself so cancel out -20 from left side to do that we should divide both sides by -20

- anonymous

sorry, i probably made this harder then it should have been LOL, ok thank you, hold on

- anonymous

|dw:1434467463164:dw|

- Nnesha

not just 1 carry down x |dw:1434467556289:dw|
and 1x is same as x
so x=4

- Nnesha

you can check your answer by plugging back into the equation both sides equal 1000% sure it's correct :-)

- anonymous

Ok thank you very much for all of your time, :)

- Nnesha

np :-)

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