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$3x +1 ; 2x ; 3x - 7$ are the first three terms of an arithmetic sequence. Calculate the value of x
in Mathematics by Diamond (78,454 points) | 309 views

1 Answer

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there is common difference

2x-(3x+1)=(3x-7)-2x

     expanding and  simplifying, x=3
by Diamond (44,036 points)

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