Marcus bought y movie posters for $3 each. Write an algebraic expression for total amount Marcus spent

Well you would have to multiply 3 by what ever (y) is so if (y) was 5 then you could put the equation many ways but just some ways are

1) 3 (y) = 15

3 (5) = 15

15=15

2) 3*y=15

3*5=15

15=15

just two ways and remember what you do to one side you have to do to the other but in this case you leave the right side alone

3y would be an algebraic expression that represents what Marcus spent.

For example:

If he bought 12 posters then 3 (12) = 36 would represent the total amount he spent.