A box of fruit has three times as many nectarines as grapefruit. Together there are 64 pieces of fruit. Write the equation that represents this situation.

4g = 64

Step-by-step explanation:

Let n = the number of nectarines

and g = the number of grapefruit

We have two conditions that must be satisfied to represent the situation:

(1) n = 3g

(2) n + g = 64

If you need one equation, we can substitute (1) into (2) and get

4g = 64