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Go Back   Freemason Hirams Travels Masonic Forums > Science & Mathematics > Mathematics

Mathematics Mathematics

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Old 02-27-2008, 07:55 PM
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7th grade math problem?

what is the answer to 2 (n+5)=-2
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Old 02-27-2008, 07:55 PM
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2n+10=-2
2n=-12
n=-6
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Old 02-27-2008, 07:56 PM
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n equals negative 6
2(n+5)= -2
--------- ---
2 2 = n+5 =-1
n+5-5=n -1-5=-6
n=-6
hope this helped!
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Old 02-27-2008, 08:04 PM
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1. first distribute (multiply the 2 with n AND five)

2(n+5)= -2
2n+10= -2

2. subtract 10 from both sides of the equation, so you only have the 2n on the left side.

2n+10 - 10= -2 -10
2n= -12

3. divide both sides by 2 to get the n by itself

2n/2= -12/2
n= -6

there's your answer!
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Old 02-27-2008, 08:06 PM
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First, you must distribute the 2 throughout the brackets, so :

2n + 5 = -2

Move the 5 to the other side
2n= -7

Move the 2 to the other side

n= -7/2
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