# Pre Algebra 7th Grade

posted by
**Maria**
.

How do I simplify the following expressions by collecting like terms?

2x-9+x=?

6x-4j+3y=?

4x+15+2x-x+9+?

j-k-j+3k=

5r+3r+4rt=

7yz+yz=

posted by
**Maria**
.

How do I simplify the following expressions by collecting like terms?

2x-9+x=?

6x-4j+3y=?

4x+15+2x-x+9+?

j-k-j+3k=

5r+3r+4rt=

7yz+yz=