how to solve this problem

Answer:
There are 112 peaches, and 56 nectarines!
Step-by-step explanation:
1) Write the question in an equation:
P+N=168
2)We know that there are twice as many peaches as Nectarines, so rewrite the variable "P" as "2N":
2N+N=168
3) Combine alike terms:
3N=168
4) Divide both sides by 3:
N=56
5) Substitute 56 as N in our equation for P (2n):
2(56)
6) Solve:
P=112