Solve one-step inequalities and represent solutions on a number line.
Solve a positive-coefficient one-step inequality
Problem
Solve \(4x~\le~20\).
Big Picture
What this problem is really about
The variable is multiplied by positive four, so divide both sides by four to isolate it. Division by a positive number preserves the ordering and keeps the inequality symbol facing the same way. Keep the equality bar as well, because a boundary that makes the original comparison equal is included; test the boundary and a value on the indicated side.
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