Solve the System of Equations: -2x + 3y = 14 and -4x + 6y = 28

Choose the correct answer for the following exercise:

{2x+3y=144x+6y=28 \begin{cases} -2x+3y=14 \\ -4x+6y=28 \end{cases}

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve the system of equations
00:06 Multiply by 2 so we can isolate Y by subtraction
00:13 Now this is the system of equations
00:23 Subtract between the equations
00:32 Group like terms
00:40 According to this expression, X and Y are correct for any value
00:56 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

Choose the correct answer for the following exercise:

{2x+3y=144x+6y=28 \begin{cases} -2x+3y=14 \\ -4x+6y=28 \end{cases}

2

Step-by-step solution

To solve this system of equations, follow these steps:

  • Step 1: Simplify the second equation:
    The second equation is 4x+6y=28-4x + 6y = 28. By dividing every term by 2, we get:
    2x+3y=14-2x + 3y = 14.
  • Step 2: Compare the simplified second equation to the first equation:
    Both equations are now 2x+3y=14-2x + 3y = 14.

Since both equations are identical after simplification, this indicates that the system represents the same line.

Therefore, the system has infinite solutions because any point that satisfies one equation will satisfy the other.

Thus, the correct answer is Infinite solutions.

3

Final Answer

Infinite solutions

Practice Quiz

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Solve the following equations:

\( \begin{cases} 2x+y=9 \\ x=5 \end{cases} \)

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