Question

1)Rezolvati in Q ecuatia : 0,2-1=-x-0,(3)

Answer 1

2/10 -1 = x - 3/9

- aducem la acelasi numitor...90.... si eliminam numitorul prin inmultire cu el insusi

18/90 - 90/90 = 90x/90 - 30/90     l ×90

18 - 90 = 90x - 30

18 - 90 + 30 = 90x

- 42 = 90x

x = - 42/90⁽² = - 21/45⁽³ = - 7/15