kristintice83 kristintice83

29-08-2020
Mathematics

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if D equals 4x + 10 e f equals 2x - 1 + d f equals 9 x - 15 find DF

Respuesta :

29-08-2020

Answer:

4x+10+2x-1=9x-15;

6x+9=9x-15;

6x-9x=-15-9;

-3x=-24;

3x=24;

from which

x=24:3=8

Then:

DF=9x-15=(9×8)-15=72-15=57

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