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Mathematics 9 Online
OpenStudy (anonymous):

Evaluate if x = 13 and y = –4. 3(2x – y) i tried everything an i cant get the right answer Please i need help someone please

OpenStudy (anonymous):

90

OpenStudy (♪chibiterasu):

Please don't give out straight answers, walk through it.

OpenStudy (anonymous):

how do you get 90

OpenStudy (♪chibiterasu):

@Jelia97 See?

OpenStudy (anonymous):

sorry in a rush helping others

OpenStudy (anonymous):

all you have to do is plug in the missing variables as they give u

OpenStudy (anonymous):

gosh! i tried everythung an i kept getting 66

OpenStudy (♪chibiterasu):

x = 13 and y = –4. 3(2x – y) First we have to plug-in the values of x and y: 3(2(13) - (-4)) First we have to multiply 2 by 13: 3(26 - (-4) Now since we have - (-4) the -(- cancels out, making it +4: 3(26 + 4) Now what do we do next?

OpenStudy (anonymous):

it couldnt be 90

OpenStudy (♪chibiterasu):

Do you know how the Distributive Property works?

OpenStudy (anonymous):

sort of

OpenStudy (♪chibiterasu):

Well we distribute the 3 into the parenthesis: 3(26 + 4)\ 78 + 12 90

OpenStudy (♪chibiterasu):

It is indeed 90

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