8th Grade · Expressions & Equations
Solution
8.EE.C.7b
Definition
A value of the variable that makes an equation true. It can be verified by substituting it back into the original equation and checking that both sides are equal.
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
Examples
- For 2x+3 = 11, x = 4 checks out: 2(4)+3 = 11.
- x = 5 does NOT work: 2(5)+3 = 13≠11.
Key rule
Always check a solution by substituting it back into the original equation.
Memory hook
The value that makes both sides equal.