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solve and check the following equation: 15=-3(x-1)+9

Guest Apr 3, 2017
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 #1
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x=-1

silverselkie  Apr 3, 2017
 #2
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15=-3(x-1)+9

15-9=-3(x-1)

6=-3x+3

6-3=-3x

3=-3x

3/-3=-3x/-3

-1=x

 

15=-3(x-1)+9

15=-3(-1-1)+9

15=3+3+9

15=6+9

15=15

 

so the answer is x=-1

Snappingtunic99  Apr 3, 2017

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