Question 480637

A variable (one or more) is a symbol used to represent a number in an expression or an equation. The value of this number can change. 

An algebraic expression is a mathematical expression that consists of variables, numbers and operations. The value of this expression can change.

if you have a
{{{Phrase}}}:

fourteen decreased by a number p

you will write an

{{{Expression}}}

{{{14 - p}}}

how to write a sentence as an algebraic equation:

if you have a

{{{Sentence}}}:

Jeanne has $17 in her piggy bank. How much money does she need to buy a game that costs $68?

you will write an

{{{Algebraic}}} {{{Equation}}}:

{{{17 + x = 68}}}

In the problem above, {{{x}}} is a {{{variable}}}. The symbols {{{17 + x = 68}}} form an algebraic equation.