Distance from a Point
Part of the Inequalities & Absolute Value section of Coddy's Algebra journey. Lesson 40 of 61.
The equation asks which numbers are five steps from 2. Split it into two cases, or , then add 2 to both sides in each case:
or
-3 and 7 are both five steps from 2
The expression is the distance between and . So says the distance between and 2 is 5, and the two solutions are the two numbers five steps from 2. The algebra gives the same answer: split, solve each case, and the two answers are the same distance from 2, one on each side.
Challenge
MediumSolve the equation for .
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All lessons in Inequalities & Absolute Value
1What an Inequality Is
The Four SignsA Picture on a LineReading It BackwardsRecap: What an Inequality Is4Two-Step Inequalities
Two StepsSubtract, Then FlipWith a FractionA Bracket on the WayRecap: Two-Step Inequalities5Variables on Both Sides
x on Both SidesGather Toward the LargerBrackets FirstAlways True, Never TrueRecap: Variables on Both Sides11From Words to Inequalities
At Least, At MostMore ThanA Budget That ShrinksTwo LimitsRecap: From Words3Multiplying and Dividing
Divide by a PositiveMultiply by a PositiveThe FlipDividing by a NegativeNegative FractionsRecap: Multiply and Divide6Graphing Solutions
From Inequality to PictureIs the Endpoint In?A Flip on the LineRecap: Graphing Solutions9Absolute Value Equations
Distance from ZeroThe Equation |x| = 3Distance from a PointIsolate the Bars FirstA Coefficient InsideNo Solution, One SolutionRecap: Absolute Equations