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Answer
The equation with both planes at the same altitude is:
[tex]9x=414[/tex]SOLUTION
Problem Statement
We have the equations of descent for two different airplanes, A and B, given in terms of the number seconds (x), as shown below:
[tex]\begin{gathered} Altitude\text{ of plane A, }H_A=820-15x \\ Altitude\text{ of plane B, }H_B=1234-24x \end{gathered}[/tex]We are asked to write the equation to show when the altitudes of the planes will be the same.
Explanation
To solve this question, we simply need to equate the two equations given above. This is because the altitudes of the planes are the same.
Thus, we can compute the solution as:
[tex]\begin{gathered} H_A=H_B \\ 820-15x=1234-24x \\ \text{ We need to collect like terms. We do this by adding 24x to both sides,} \\ \text{and subtracting 820 from both sides} \\ \\ 820-820-15x+24x=1234-24x+24x-820 \\ 9x=414 \end{gathered}[/tex]Final Answer
The equation with both planes at the same altitude is:
[tex]9x=414[/tex]
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