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5intreg si 2 pe 3 x-12=2,5

va rog e urgent
dau 30 de punca si coroana!!!!!!!!

Răspuns :

Cocirmariadenis

5 intregi si 2 / 3 = ( 5 x 3 + 2 ) / 3 = 17 / 3


2,5 = 25 / 10 = 5 / 2


17 x / 3 - 12 = 5 / 2


17 x / 3 = 5 / 2 + 12


17 x / 3 = 5 / 2 + 24 / 2


17 x / 3 = 29 / 2 ⇒ 2 · 17 x = 3 · 29 ⇒ 34 x = 87 ⇒


x = 87 / 34 = 2 intregi si 19 / 34 ≈ 2,5588

[tex] \frac{17x - 36}{3} = 2 \frac{5}{10} \\ \\ 17x - 36 = (2 \frac{5}{10}) \times 3 \\ \\ 17x - 36 = \frac{5}{2} \times 3 \\ \\ 17x - 36 = \frac{15}{2} \\ \\ 17x - 36 = 7 \frac{1}{2} \\ \\ 17x = 7 \frac{1}{2} + 36 \\ \\ 17x = \frac{15}{2} + 36 \\ \\ 17x = \frac{87}{2} [/tex]

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