review the graphs of a system of two linear equations in two variables: x-5y=3 and 3x-2y= -4 find the solution to both equations

1 answer

To find the solution to the system of equations given by:

  1. \( x - 5y = 3 \) (Equation 1)
  2. \( 3x - 2y = -4 \) (Equation 2)

Let's first solve each equation for \( y \) in terms of \( x \) to facilitate graphing and understanding.

Step 1: Solve Equation 1 for \( y \)

Starting with Equation 1:

\[ x - 5y = 3 \]

Rearranging it to isolate \( y \):

\[ -5y = 3 - x \]

Now, divide both sides by -5:

\[ y = \frac{1}{5}x - \frac{3}{5} \]

Step 2: Solve Equation 2 for \( y \)

Now for Equation 2:

\[ 3x - 2y = -4 \]

Rearranging to solve for \( y \):

\[ -2y = -4 - 3x \]

Divide both sides by -2:

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

Step 3: Find the Intersection Point

We can now set the two equations for \( y \) equal to each other to find the intersection point:

\[ \frac{1}{5}x - \frac{3}{5} = \frac{3}{2}x + 2 \]

To eliminate the fractions, multiply everything by 10:

\[ 2x - 6 = 15x + 20 \]

Now simplify the equation:

\[ 2x - 15x = 20 + 6 \]

\[ -13x = 26 \]

Now, solve for \( x \):

\[ x = -2 \]

Step 4: Substitute \( x \) back to find \( y \)

Now substitute \( x = -2 \) back into either original equation. We can use Equation 1:

\[ -2 - 5y = 3 \]

Rearranging gives:

\[ -5y = 3 + 2 \]

\[ -5y = 5 \]

Now solve for \( y \):

\[ y = -1 \]

Conclusion

The solution to the system of equations \( x - 5y = 3 \) and \( 3x - 2y = -4 \) is:

\[ \boxed{(-2, -1)} \]

Graphing

If we were to graph these two equations, we would plot the lines represented by each equation. The intersection point \((-2, -1)\) would be the point where both lines cross, representing the solution to this system of equations.