An aquarium at a pet store has 18 black neon tetra fish in it . a customer buys 12 black neon tetra fish at the same time the store clerk adds 7 more black neon tetra fish are in the aquarium now ?

18-12+7

 6 + 7

13

Write an equation.

Subtract first- the customer buys 12 black neon tetra fish which means subtraction

addition- the store clerk puts in 7 more black neon tetra fish which means your gonna add 7

18-12. Add 7. Get 13. :)

the graph on the bottom right

answer: idk

step-by-step explanation: