1. Absolute value
Video: https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-negative-number-topic/cc-6th-absolute-value/v/absolute-value-of-integers
Video:
Video:
Equations:
https://x.eiramath.com/home/maa5/absolute-value-equations
https://www.pittsfordschools.org/cms/lib/NY02205365/Centricity/Domain/529/HWKEYSolving%20Absolute%20Value%20Equations.pdf
Inequalities:
https://tutorial.math.lamar.edu/problems/alg/SolveAbsValueIneq.aspx
https://cdn.kutasoftware.com/Worksheets/Alg2/Absolute%20Value%20Inequalities.pdf