Solve for X and Y: Exploring the System -8x + 5y = 2, -16x + 10y = 5

Question

Choose the correct answer for the following exercise:

{8x+5y=216x+10y=5 \begin{cases} -8x+5y=2 \\ -16x+10y=5 \end{cases}

Video Solution

Step-by-Step Solution

To solve this system of equations, we'll follow these steps:

  • Step 1: Analyze the proportions of the coefficients to check for potential parallelism or redundancy.
  • Step 2: Attempt elimination to directly identify any inconsistencies.

Now, let's perform the analysis:
Step 1: Notice the proportionality in both equations:
The first equation is 8x+5y=2-8x + 5y = 2 and the second is 16x+10y=5-16x + 10y = 5. Multiply the first equation by 2:
16x+10y=4-16x + 10y = 4.
This equation is now equivalent in terms of xx and yy to the second equation, but with a different constant term.

Step 2: Subtract the modified first equation from the second equation:

(16x+10y)(16x+10y)=54 (-16x + 10y) - (-16x + 10y) = 5 - 4 0=1 0 = 1

This result, 0=10 = 1, is a contradiction, indicating that the system is inconsistent.

Therefore, the system of equations has no solution.

Answer

No solution