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22-09-2016
Mathematics

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Which value of x makes the open sentence true? 7 – x = 3x + 5

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Arzeebo Arzeebo

22-09-2016

7-x = 3x-2
7-5 = 3x-x
2 = 4x
2/4=x
1/2=x

7-1/2=3*1/2+5
14-1/2=3+10/2
13/2=13/2

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