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Solution and verification by substitution

Mathematics — first biennium · Lesson

Equations · 2

A solution is verified, not guessed

To check a value, substitute it for x in both members. Calculate the left and right members separately: the value is a solution only if the two results match.

Formula matematica
Formula matematica
Criterion
Formula matematica
What you need to know before the exercises

In this lesson: Verify a value by substituting it into both members and comparing the results.

You can already assume: Meaning of an equation.

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Verify the proposed value

Guided

Completed exercises: 0/5 · Correct on first attempt: 0

Guide
  1. Substitute x = 3 in the left member.
  2. Repeat in the right member.
  3. Compare the two values obtained.
Formula matematica
with x = 3
Your competency map

What you need to know for Solution and verification by substitution

ConceptStep separates what is required from what is recommended or useful as reinforcement. Only required prerequisites block your progress.

Current topic Strong skill Review due Needs reinforcement To be mastered Optional support

Relationships: solid line = required · dashed line = recommended · dotted line = reinforcement.

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