TEACHER-GUIDE-VERIFIED · TG-V9-028

1. Two probes collect 26 samples; Probe A collects 4 more than B. Find each amount.

Verified solution

Solution: a+b=26 and a=b+4. Substitute: 2b+4=26, so b=11 and a=15.

Source: Teacher Guide V9 · English V9. Match the numbers and wording in your printed question before using this solution.

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VIDEO HELP · TG-V9-028

Solve a System by Substitution | Two Probes, 26 Samples (TG-V9-028)

Use a + b = 26 and a = b + 4 to solve by substitution. Probe A collects 15 samples and Probe B collects 11; check both the total and difference.

Space Math Explorers · approved worked example · 1:50 · Watch on YouTube

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These pages reproduce verified solution steps for the registered V9 questions. It does not diagnose learning needs or replace instruction from a qualified teacher or tutor.