Question

Sendo X = -4-(5-7)
Y= 2+(9-16) e Z= -5-(-2-4) calcule o valor de:

A) X-Y-Z

B) Y-(X-Z)

C) Z+(-X-Y)


D) ( X-Y)-(Z-X)

Answer 1

Sendo:
 
x = - 4 - (5 - 7)
x =  - 4 - ( - 2)
x = - 4 + 2
x = - 2

y= 2 + (9 - 16)
y = 2 + ( - 7)
y = 2 - 7
y = - 5

z = - 5 - (- 2 - 4)
z = - 5 - ( - 6)
z = - 5 + 6
z = 1

calcule o valor de: 

x = - 2 
y = - 5
z = 1

**********************
A)
= X - Y - Z
= - 2 - (-5) - 1
= - 2 + 5 - 1
= - 3 + 5
= 2

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B)
x = - 2 ;  y = - 5; z = 1

= Y - (X - Z)
= - 5 - (- 2 - 1)
= - 5 - ( - 3)
= - 5 + 3
= - 2

*****************************
C)
x = - 2; y = - 5; z = 1

= Z + ( - X - Y)
= 1 + [  - (-2) - (-5)]
= 1 + [ 2 + 5]
= 1 + 7
= 8

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D)
x = - 2; y = - 5; z = 1

= ( X - Y) - (Z - X)
= [ - 2 - (-5)] - [ 1 - (-2)]
= [ - 2 + 5] - [ 1 + 2]
= 3 - 3
= 0