Let nails 7/pound=N1
nails 3/pound=N2
let N1=x
N2=6
then total=x+6
7x+6*3=(x+6)*4
7x+18=4x+24
3x=6
x=2
so 2 pounds on Nails costing 7/pound must be added
Answer:
1,6,3,4,12
Step-by-step explanation:
This is quite simple. Watch as I get it wrong. I probably miss under stood it.
Answer:
k-l= 7 -3
6 0
Step-by-step explanation:
k-l=13 7 - 6 10
25 18 19 18
= 13-6 7-10
25-19 18-18
= 7 -3
6 0
Answer: B. positive
Step-by-step explanation: An even number of negatives multiplied together makes a positive, and an odd number makes a negative.