Leverage the System of Equations: 'x - y = 8' and '2x - 2y = 16' to Find x and y

xy=8 x-y=8

2x2y=16 2x-2y=16

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 Let's multiply one of the equations by 2, so we can subtract between them
00:14 Now let's subtract between the equations
00:18 Let's simplify what we can
00:26 There are infinite solutions
00:41 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

xy=8 x-y=8

2x2y=16 2x-2y=16

2

Step-by-step solution

To solve this problem, we'll follow these steps:

  • Step 1: Write the given equations.

  • Step 2: Simplify and compare the equations to each other.

  • Step 3: Determine the nature of the solution.

Now, let's work through each step:

Step 1: The given system of equations is:

xy=8 x - y = 8
2x2y=16 2x - 2y = 16

Step 2: Simplify and compare the two equations:

The second equation 2x2y=16 2x - 2y = 16 can be divided entirely by 2 to give:

xy=8 x - y = 8

Step 3: Observe that both equations are identical, meaning they represent the same line.

Therefore, this system of equations has infinite solutions, as every point on the line satisfies the equation.

The correct answer to the original problem is: Infinite solutions

3

Final Answer

Infinite solutions

Practice Quiz

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\( \begin{cases} x+y=8 \\ x-y=6 \end{cases} \)

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