Solve the Linear Equation Pair: x-y=8 and 2x-2y=16

xy=8 x-y=8

2x2y=16 2x-2y=16

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Step-by-step video solution

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00:00 Solve
00:04 Let's multiply one of the equations by 2, so we can subtract between them
00:18 Now let's subtract between the equations
00:24 Let's reduce what we can
00:37 There are infinite solutions
00:41 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

xy=8 x-y=8

2x2y=16 2x-2y=16

2

Step-by-step solution

To solve this system of equations, let's first look at the given equations:
Equation 1: xy=8 x - y = 8
Equation 2: 2x2y=16 2x - 2y = 16

Let's simplify the second equation. We can divide the entire equation by 2:

2x2y2=162\frac{2x - 2y}{2} = \frac{16}{2}

This simplifies to:
xy=8x - y = 8

We can see now that both equations are identical:
1. xy=8 x - y = 8
2. xy=8 x - y = 8

Since both equations represent the same line, every point that is a solution to the first equation is also a solution to the second equation. This means that there are infinitely many solutions, as every point on the line xy=8 x - y = 8 is a solution.

Therefore, the system of equations has 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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