The Addition Property of Inequality
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
The addition property of inequality says adding or subtracting the same number on both sides leaves the inequality's direction unchanged.
Show
x + 3 < 7 becomes x < 4 after subtracting 3 — and 0 satisfies both, while 5 satisfies neither.
Watch for
Direction is the thing being protected.
Builds on
- Nothing — this is a starting point.
Unlocks
- Nothing yet depends on this.