Respuesta :

merue

Answer:

9

Step-by-step explanation:

  • Rule => if ''a'' is negative, |a| = -a
  • |0| = 0
  • absolute value means how far a number from 0
  • if we don't know anything about x,and x equals to a. We can say   |x| = a and  |-x| = a....
  • So , x or -x equals a . But both of x aren't equals a, one of them is same

|a| + |b + c| =  |-4| + |2 + (-7)|

|-4| = -(-4) = +4

|2 + (-7)| = |-5|

|-5| = -(-5) = +5

4 + 5 = 9

Hope this helps ^-^