Solve for x. http://static.k12.com/bank_packages/files/media/mathml_ff9880f11e5700b3ac00ce0e219e629e709767af_1.gif

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Solve for x. http://static.k12.com/bank_packages/files/media/mathml_ff9880f11e5700b3ac00ce0e219e629e709767af_1.gif

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@Nnesha i think its 8
substitute x value to check ur answer if both sides are equal then 8 is right
oh alright

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2 x 8 - 4 like that?
|dw:1434465604776:dw| just like this
yep right first multiply and then subtract
its not right, cause 2(8) -4 = 12 and 2(8) = 16
yes right both sides are not equal btw you should reduce the fraction but in this case nope 8 is not correct
same like previous one cross multiply :-)
|dw:1434465831423:dw| thats what i did to get 8
alright thanks for showing work i appreciate now easy to start :-) |dw:1434465966222:dw| supposed to be \[\huge\rm 2x(10) =20(2x-4)\]
|dw:1434466031483:dw|
Ohhh alright so 20x = (2x - 4)
\(\color{blue}{\text{Originally Posted by}}\) @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
is the blue 2x x 10
yes right 2x times 10 :-)
2x(10) =20x right
yes right
20 (2x - 4) _4 -4 16 0 right?
or did i do it completely wrong
nope nope 20(2x-4) is same as 20 Times (2x-4) so multiply everything which is inside the parentheses by outside term
\[\huge\rm \color{reD}{20}(2x-4) = \color{reD}{20} \times 2x - \color{red}{20 }\times 4\]
20 x 2x = 40x and 20 x 4 = 20 so 40x - 20 would equal 20x right
40x is right but 20 times -4 =what ?
-80
yes so \[\huge\rm 20x=40x-80\] now solve for x :-)
|dw:1434466742176:dw| like that?
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
|dw:1434466920771:dw|
yep right \[-20x=-80\] LAST STEp solve for x!
i forgot, do i divided -20x by 2, i forgot
goal is to isolate x so u need to cancel out -20 from left side :-)
|dw:1434467130802:dw| like tht or something
nope it's -20 TIMES X so do opposite of multiplication to cancel out -20 from left side
|dw:1434467252579:dw| im sorry, is this how? im confused
\[\frac{ -20x }{ ?}= \frac{ -80 }{ ?}\] remember opposite of multiplication is division so you should divide sides by ... ?/
goal is to isolate x!!! :-)
but how do i isolate x
divide both sides by -20
you need x itself so cancel out -20 from left side to do that we should divide both sides by -20
sorry, i probably made this harder then it should have been LOL, ok thank you, hold on
|dw:1434467463164:dw|
not just 1 carry down x |dw:1434467556289:dw| and 1x is same as x so x=4
you can check your answer by plugging back into the equation both sides equal 1000% sure it's correct :-)
Ok thank you very much for all of your time, :)
np :-)

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