Question

va rog sa ma ajutati ​

Answer 1

Răspuns:

Explicație pas cu pas:

x = 13/60*20 - 5/8 (7/2 - 7/3)

= 13/3 - 5/8(21/6 - 14/6)

= 13/3 - 5/8*7/6

= 13/3 - 35/48

=208/48 - 35/48

= 173/48

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y = 8/15 : [(7/5 - 5/2)*10 + 3] + 7/30 = 8/15 : [(14/10 - 25/10)*10 + 3] + 7/30

= 8/15 : (-9/10 *10 + 3) + 7/30 = -8/15 : (-9 + 3) + 7/30 = -8/15 : (-6) + 7/30

= 8/90 + 21/90 = 29/90

______________

z = 12/25*[(4/3 - 6/5)*15 + 8] - 4/5

= 12/25*[(20/15 - 18/15)*15 + 8] - 4/5

= 12/25*(2/15 *15 + 8) - 4/5 = 12/25*(2 + 8) - 4/5 = 12/25*10 - 4/5

= 24/5 - 4/5 = 20/5 = 4