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(4x+1), (4x+3), (12x+1) are the first three in an arithmetic sequence, solve for x.

 Mar 9, 2020
 #1
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4x + 3 - (4x + 1) = 2  

 

So we must have 12x + 1 - (4x + 3) = 2

 

8x - 2 = 2

 

8x = 4

 

x = 1/2

 Mar 9, 2020

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