I believe it'd be -x - 18 you'd add the 12x and 2x and get 14x-15x and get -x then you'd combine the -15 and -3 to get -18.
First one because thats simple
Answer:
Each notebook costs $2
Step-by-step explanation:
We have to find the amount she spent on each notebook.
22-10=12
We know she spent $12 on six notebooks
We need to divide to find the answer
12/6=2
Each notebook costs $12
