the product of a number and 15 is not less than 15
The phrase a number means an arbitrary variable. Let's call it x.
x
the product of a number and 15 means we multiply x by 15
15x
The phrase not less than means greater than or equal to. We set 15x greater than prequel to 15
15x >= 15 <-- This is our algebraic expression
If the problem asks you to solve for x:
Divide each side by 15:
15x/15 >= 15/15
x >= 1
The phrase a number means an arbitrary variable. Let's call it x.
x
the product of a number and 15 means we multiply x by 15
15x
The phrase not less than means greater than or equal to. We set 15x greater than prequel to 15
15x >= 15 <-- This is our algebraic expression
If the problem asks you to solve for x:
Divide each side by 15:
15x/15 >= 15/15
x >= 1