13x - y = 19
-y = - 13x + 19
y = 13x + 19
Answer:
90 I am guessing. if it's like a square or rectangle
N-8=21 should be the answer
Answer:
The weight of box and pocking material
pound
Step-by-step explanation:
Let the weight of box and packing material 
weight of package
pounds
total weight
pound

Subtract both side by 

Hence weight of box and packing material
pound