8th Grade · Expressions & Equations
Constraint
8.EE.C.8c
Definition
A condition or limit in a problem, such as a total number or total cost, that is translated into an equation. A system of equations encodes all the constraints.
Examples
- '10 tickets sold' becomes the equation a + c = 10.
- 'Total of 68 dollars' becomes 8a + 5c = 68.
Key rule
Each constraint in a word problem becomes one equation.
Memory hook
A real-world limit, turned into an equation.