Solve one-step equations and interpret the solution in context.
Translate equation words into symbols
Problem
Translate “a number increased by \(9\) is \(20\)” into a one-step equation, then solve it. Report the equation and solution.
Big Picture
What this problem is really about
Translate the sentence one relationship at a time: “increased by” describes addition to the unknown, while “is” marks equality with twenty. Once the symbolic equation matches those words, undo the increase with equal subtraction on both sides. Adding nine back provides a quick check of the translation and solution.
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