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Mathematics 12 Online
OpenStudy (anonymous):

-14=-4(9x-1)

OpenStudy (anonymous):

do you know how to simplify the right side of the equation ? ( -4(9x-1) )

OpenStudy (anonymous):

-14=-4(9x-1) 14/4 =9x-1 7/2 = 9x-1 7=18x-2 18x=9 x=18/2 =9

OpenStudy (anonymous):

why people keep just solving questions :|

OpenStudy (anonymous):

dont you times -4 and 9x then times -4 and 1

OpenStudy (anonymous):

-4 and -1 .. so what will you have then ?

OpenStudy (anonymous):

36x-4?

OpenStudy (anonymous):

so then the hole thing would look like -14=36x-4??

OpenStudy (anonymous):

-36x + 4 notice that - times + is minus and - times - is plus

OpenStudy (anonymous):

-14 = -36x + 4

OpenStudy (anonymous):

why would it change to a plus? if it started with a minus. in the ( )??

OpenStudy (anonymous):

you had -4 ( 9x - 1) = -4 * 9x + (-4)*(-1) = -36x + 4

OpenStudy (anonymous):

-14 = -4(9x - 1) -14 = -36x + 4 -14 - 4 = -36x -18 = -36x x = 1/2

OpenStudy (anonymous):

do you understand why now ?

OpenStudy (anonymous):

no not really

OpenStudy (anonymous):

ya i do cause i forgot you had to flip the minus to a postive.

OpenStudy (anonymous):

ok first .. whenever you multiply minus by plus you get a minus for example : -1 * 2 = -2 whenver you multiply minus by minus you get plus for example : -1 * -2 = 2 whenver you multiply plus by plus you get plus for example 1 * 2 = 2

OpenStudy (anonymous):

so same here : -4 ( 9x - 1) = -4 * 9x + (-4)*(-1) = -36x + 4 -4 * 9x -> will be minus -4 * -1 -> will be plus

OpenStudy (anonymous):

ya i get it now.. so can you help me with the rest of my home work so i understand it?

OpenStudy (anonymous):

please and thank you

OpenStudy (anonymous):

wait .. so you solved for x ?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

what did you get ?

OpenStudy (anonymous):

just a minute

OpenStudy (anonymous):

ok. Thanks.

OpenStudy (anonymous):

\[-14=-4(9x-1) -14=-36x+4 -14+4=10 10=-36x 10/-36x=-26\]

OpenStudy (anonymous):

dont know what you wrote here.. but : -14 = -36x + 4 subtract 4 from both sides to isolate x term what will you have ?

OpenStudy (anonymous):

-18=-36x???

OpenStudy (anonymous):

so wouldnt x=.5

OpenStudy (anonymous):

very good

OpenStudy (anonymous):

thank you for helping me.

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