TEACHER-GUIDE-VERIFIED · TG-V9-004

1. A launch vehicle carries 4 identical fuel cells and a 120-unit reserve for 920 total units. Write and solve 4f + 120 = 920.

Verified solution

Solution: 4f + 120 = 920; subtract 120: 4f = 800; divide by 4: f = 200 units per cell.

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-V9-004

Solve a Two-Step Rocket Fuel Equation

Solve 4f + 120 = 920 for four identical fuel cells and a 120-unit reserve. Subtract 120, divide the remaining 800 by 4, and check f = 200 units per cell in the original equation.

Space Math Explorers · approved worked example · 1:58 · 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.