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When x=7,  5-3(x-1)= ?

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patriciabmcca... | High School Teacher | eNoter

Posted March 22, 2013 at 12:25 PM via web

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When x=7,  5-3(x-1)= ?

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Mary Joy Ripalda | High School Teacher | (Level 3) Educator

Posted March 22, 2013 at 1:29 PM (Answer #1)

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To evaluate the expression, plug-in the value of x.

`5-3(x-1)`

`=5-3(7-1)`

From here, follow the order of operations which is PEMDAS, So,simplify the expression insides the parenthesis.

`=5-3(6)`

Then, multiply.

`=5-18`

And subtract.

`=-13`

Hence, when `x=7` ,   `5-(x-1)=-13` .

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pramodpandey | College Teacher | Valedictorian

Posted March 22, 2013 at 3:27 PM (Answer #2)

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`5-3(x-1)=5-3x+3=5+3-3x=8-3x`

`8-3x=8-3*7=8-21=-13`

When x=7, => -13

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atyourservice | TA , Grade 10 | Valedictorian

Posted March 22, 2014 at 11:47 PM (Answer #3)

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x=7,  5-3(x-1)=

5-3(7-1)

5-3(6)

5-18=-13

-13

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zumba96 | TA , Grade 11 | Valedictorian

Posted May 17, 2014 at 10:41 PM (Answer #4)

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Plug it in

 x=7,  5-3(x-1)= ?

5-3(7-1)=5-3(6)

By the Order of Operations

5-18=

-13

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jess1999 | TA , Grade 9 | Valedictorian

Posted June 23, 2014 at 12:52 AM (Answer #5)

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If x = 7 then 5 - 3 ( x - 1 )=

First plug in 7

By plugging in 7, your equation should look like

5 - 3 ( 7 - 1 ) Now subtract 7 and 1

By subtracting, your equation should look like

5 - 3 ( 6 ) Now distribute the 3

By distributing, your equation should look like

5 - 18 Lastly just subtract 5 with 18

By subtracting you should get

= -13 which is your answer

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nisarg | TA , Kindergarten | Valedictorian

Posted June 24, 2014 at 2:07 PM (Answer #6)

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When x=7,  5-3(x-1)= ?

so substitute 7 in the place of x

5-3(7-1)  follow pemdas and simplify

5-3(6)           subtract 1 from 7

5-18          multiply 3*6

-13            subtract 18 from 5

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