Solve for x -2x+1=9
plz help i forgot a bit of what me and my class have been learning because they didn't give us notes to help us

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.

5cakes cost 3.50 how much do 7 cakes cost