Answer:
-4
Step-by-step explanation:
whatever is inside the vertical lines becomes positive
vertical lines mean “the absolute value of that expression”
number inside the vertical lines mean how far the number is from 0
absolute value can be 0 or positive but never negative
but a negative in front of the vertical lines means
-1 times absolute value of that number
-|-7 + 3| =
-|-4| =
-1 times |-4| =
-1 times 4 =
-4
https://www.quora.com/What-do-two-vertical-lines-on-either-side-of-a-part-of-a-mathematical-equation-mean
