Problem

Write the word phrase as an algebraic expression, using x as the variable. See Example.EXA...

Write the word phrase as an algebraic expression, using x as the variable. See Example.

EXAMPLE Using Variables to Write Word Phrases as Algebraic Expressions

Write each word phrase as an algebraic expression, using x as the variable.

(a)
(b)
x − 7 is incorrect. We cannot subtract in either order and get the same result.
(c)
Compare this result with “12 subtracted from a number,” which is x − 12.
(d)
(e)
(f)
We are multiplying 2 times “something.” This “something” is the difference between a number and 8, written x − 8. We use parentheses around this difference.