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16-08-2017
Mathematics

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Point E is between points D and F. If DE = x − 1, EF = 4x + 2, and DF = 6x − 7, find x.

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sss333111 sss333111

22-08-2017

DE = x − 1

EF = 4x + 2

DF = 6x − 7

DE + EF = DF

x-1 + 4x +2 = 6x -7

x + 4x - 6x = 1-2-7

-x = -8

x = 8

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