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.
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.