Answer: The required number of guppies that she can purchase is 5.
Step-by-step explanation: Given that Rebecca bought one gold fish for $35 and one star fish for $12. She spends the rest of the money on guppy fish.
She starts with $80. Each guppy fish costs $6.
We are to write and solve an inequality to determine the number of guppies she can purchase.
Let x represents the number of guppy fishes that she can purchase.
Then, according to the given information, the inequality can be written and solved as follows :

Thus, the required number of guppies that she can purchase is 5.