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I. 8x+y = 10 II. 4x+2y = 13...

I. ` 8x+y = 10`
II.` 4x+2y = 13`

A

if ` x gt y`

B

if `x lt y`

C

if `x ge y`

D

if `x le y`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the system of equations: I. \( 8x + y = 10 \) II. \( 4x + 2y = 13 \) we will follow these steps: ### Step 1: Simplify the second equation First, we will manipulate the second equation to make it easier to work with. We can multiply the entire second equation by 2 to align the coefficients of \(y\) with the first equation. \[ 4x + 2y = 13 \implies 2(4x + 2y) = 2(13) \implies 8x + 4y = 26 \] ### Step 2: Write down the modified equations Now we have two equations: 1. \( 8x + y = 10 \) (Equation 1) 2. \( 8x + 4y = 26 \) (Modified Equation 2) ### Step 3: Eliminate \(x\) Next, we will eliminate \(x\) by subtracting Equation 1 from Modified Equation 2. \[ (8x + 4y) - (8x + y) = 26 - 10 \] This simplifies to: \[ 4y - y = 16 \implies 3y = 16 \] ### Step 4: Solve for \(y\) Now we can solve for \(y\): \[ y = \frac{16}{3} \] ### Step 5: Substitute \(y\) back to find \(x\) Now that we have \(y\), we can substitute it back into Equation 1 to find \(x\): \[ 8x + \frac{16}{3} = 10 \] To isolate \(8x\), we subtract \(\frac{16}{3}\) from both sides: \[ 8x = 10 - \frac{16}{3} \] To perform the subtraction, we need a common denominator. The number 10 can be written as \(\frac{30}{3}\): \[ 8x = \frac{30}{3} - \frac{16}{3} = \frac{30 - 16}{3} = \frac{14}{3} \] ### Step 6: Solve for \(x\) Now we divide both sides by 8 to solve for \(x\): \[ x = \frac{14}{3} \cdot \frac{1}{8} = \frac{14}{24} = \frac{7}{12} \] ### Summary of Solutions Thus, we have: \[ x = \frac{7}{12}, \quad y = \frac{16}{3} \] ### Step 7: Compare \(x\) and \(y\) Now we can compare the values of \(x\) and \(y\): - \(x = \frac{7}{12} \approx 0.583\) - \(y = \frac{16}{3} \approx 5.333\) Since \(y > x\), we can conclude that the correct option is that \(y\) is greater than \(x\).

To solve the system of equations: I. \( 8x + y = 10 \) II. \( 4x + 2y = 13 \) we will follow these steps: ### Step 1: Simplify the second equation ...
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