Review the graphs of a system of these two linear equations in two variables: y=4x−10 and y=−2x+8 Find the solution of the system.

y = -2x + 8 y = 4x - 10

1 answer

To find the solution of the system of equations given by \( y = 4x - 10 \) and \( y = -2x + 8 \), we can set the two equations equal to each other since they both equal \( y \):

\[ 4x - 10 = -2x + 8 \]

Next, we can solve for \( x \):

  1. Add \( 2x \) to both sides: \[ 4x + 2x - 10 = 8 \] \[ 6x - 10 = 8 \]

  2. Add 10 to both sides: \[ 6x = 18 \]

  3. Divide both sides by 6: \[ x = 3 \]

Now that we have \( x = 3 \), we can substitute this value into either equation to find \( y \). We'll use the first equation \( y = 4x - 10 \):

\[ y = 4(3) - 10 \] \[ y = 12 - 10 \] \[ y = 2 \]

Thus, the solution to the system of equations is:

\[ (x, y) = (3, 2) \]

Summary of the Solution:

The solution of the system of equations \( y = 4x - 10 \) and \( y = -2x + 8 \) is \( (3, 2) \).

Graphical Interpretation:

  • The lines represented by these equations will intersect at the point \( (3, 2) \).