consider the following system of equations 1/3x+y=3, 2y=-2/3x+10 solve using the elimination method show your work

1 answer

To solve the system of equations using the elimination method, we start with the given equations:

  1. \(\frac{1}{3}x + y = 3\) (Equation 1)
  2. \(2y = -\frac{2}{3}x + 10\) (Equation 2)

First, let’s rewrite both equations in a more manageable form.

Step 1: Clear the fractions

For Equation 1, we can multiply through by 3 to eliminate the fraction:

\[ 3 \left(\frac{1}{3}x + y\right) = 3 \cdot 3 \]

This simplifies to:

\[ x + 3y = 9 \quad \text{(Equation 3)} \]

For Equation 2, we already see a way to express it without fractions. We can rearrange it to solve for \(y\):

First, divide the entire equation by 2:

\[ y = -\frac{1}{3}x + 5 \quad \text{(Equation 4)} \]

Step 2: Substitute Equation 4 into Equation 3

Now, we'll substitute Equation 4 into Equation 3:

So, substituting \(y\) in Equation 3, we have:

\[ x + 3\left(-\frac{1}{3}x + 5\right) = 9 \]

Step 3: Simplifying

Expand the equation:

\[ x - x + 15 = 9 \]

This simplifies to:

\[ 15 = 9 \]

Step 4: Analyze the Result

The equation \(15 = 9\) is incorrect and indicates that our system of equations has no solution, implying that the lines represented by these two equations are parallel and do not intersect.

Conclusion

Thus, the system of equations has no solution. The lines are parallel.