Question

word phrase to algeb expre..
one third of a number , subtracted from 13

Answer 1

Breaking this up into pieces will make it easier to visualize. The first part:
one third, you know what one third is.
Second part:
of a number, when you have 3 "of" something you use which operation? In algebra you use 'what' to represent "any number"?
Third part:
subtracted from 13, well you know how to subtract "from" 13.
Answer each of the parts and then put them together for your final answer.