IDNLearn.com makes it easy to get reliable answers from experts and enthusiasts alike. Receive prompt and accurate responses to your questions from our community of knowledgeable professionals ready to assist you at any time.

Solve the system of equations:

[tex]\[ \frac{3x - y}{y - 2} = 4 \][/tex]
[tex]\[ \frac{x + 2y}{2x - y} = 3 \][/tex]


Sagot :

To find the values of [tex]\( x \)[/tex] and [tex]\( y \)[/tex] that satisfy the given system of equations:

[tex]\[ \begin{aligned} \frac{3x - y}{y - 2} &= 4 \\ \frac{x + 2y}{2x - y} &= 3 \end{aligned} \][/tex]

let's solve them step by step.

### Step 1: Solve the first equation

First, isolate the fraction in the first equation:

[tex]\[ \frac{3x - y}{y - 2} = 4 \][/tex]

Multiply both sides by [tex]\( y - 2 \)[/tex] to eliminate the denominator:

[tex]\[ 3x - y = 4(y - 2) \][/tex]

Distribute the 4 on the right side:

[tex]\[ 3x - y = 4y - 8 \][/tex]

Rearrange to gather all [tex]\( y \)[/tex]-terms on one side:

[tex]\[ 3x - y - 4y = -8 \][/tex]

Combine like terms:

[tex]\[ 3x - 5y = -8 \quad \text{(1)} \][/tex]

### Step 2: Solve the second equation

Next, isolate the fraction in the second equation:

[tex]\[ \frac{x + 2y}{2x - y} = 3 \][/tex]

Multiply both sides by [tex]\( 2x - y \)[/tex]:

[tex]\[ x + 2y = 3(2x - y) \][/tex]

Distribute the 3 on the right side:

[tex]\[ x + 2y = 6x - 3y \][/tex]

Rearrange to gather all [tex]\( y \)[/tex]-terms on one side:

[tex]\[ x - 6x + 2y + 3y = 0 \][/tex]

Combine like terms:

[tex]\[ -5x + 5y = 0 \][/tex]

Divide both sides by 5:

[tex]\[ -x + y = 0 \quad \text{(2)} \][/tex]

### Step 3: Solve the linear system

Now we solve the linear system composed of equations (1) and (2):

[tex]\[ \begin{aligned} 3x - 5y &= -8 \quad \text{(1)} \\ -x + y &= 0 \quad \text{(2)} \end{aligned} \][/tex]

From equation (2), we can express [tex]\( y \)[/tex] in terms of [tex]\( x \)[/tex]:

[tex]\[ y = x \][/tex]

Substitute [tex]\( y = x \)[/tex] into equation (1):

[tex]\[ 3x - 5(x) = -8 \][/tex]

Simplify and solve for [tex]\( x \)[/tex]:

[tex]\[ 3x - 5x = -8 \\ -2x = -8 \\ x = 4 \][/tex]

Since [tex]\( y = x \)[/tex], we have:

[tex]\[ y = 4 \][/tex]

### Conclusion

The solution to the system of equations is:

[tex]\[ x = 4, \quad y = 4 \][/tex]