Modeling Situations with Equations

Real-world situations involving a fixed amount and a changing amount can be represented with equations. A variable represents the unknown value, while

Real-world situations can often be represented using equations. Writing an equation from a word problem involves identifying the unknown quantity and

Equations can be used to represent relationships between quantities in real-world situations. Writing an equation involves identifying an unknown quan

A solution to an equation is more than a number. It represents an unknown quantity in a real situation, so its meaning, unit, and reasonableness must