College Algebra / Unit 3 Alg 132 short lesson, about 20 seconds
The Solution of an Equation
Captions available
The idea
A solution of an equation is a value of the variable that makes the equation true; solving means finding every such value.
In practice
For 3x + 7 = 19, the value x = 4 checks: 12 + 7 = 19. No other number does.
Where people slip
A solution is verified by substitution, never by trust in the steps.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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