A standard piano has 88 keys on it
Answer:
none
Step-by-step explanation:
Use inverse operations and subtract 3 from 9 which is -12 then divide -12 by 6 which is -2
-9=3+6x
-3 -3
-12=6x
-12/6=6x/6
-2=x
18 divided by 4 this equals 4 with a remainder of 2 so i guess the 2 go in another row
