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Rezolvati in R ecuatue

Rezolvati In R Ecuatue class=

Răspuns :

5+7(1-x)-5x=x-8
5+7-7x-5x=x-8
12-12x=x-8
-12x-x=-8-12
-13x=-20
x=20/13
d) 5 + 7(1-x) - 5x = x-8

5 + 7 - 7x - 5x = x - 8

12 - 12x = x- 8

-12x - x = -8 - 12

-13x = -20 /×(-1)

13x=20

x=20/13