Which equation results from adding the equations in this system?

Negative 8 x + 8 y = 8. 3 x minus 8 y = negative 18.
5 x = negative 10
5 x = 26
Negative 5 x = 26
Negative 5 x = negative 10

1 answer

To add the given equations in the system, we first rewrite them clearly:

  1. \(-8x + 8y = 8\) (Equation 1)
  2. \(3x - 8y = -18\) (Equation 2)

Next, we will add these two equations together.

Starting with Equation 1: \[ -8x + 8y = 8 \]

And Equation 2: \[ 3x - 8y = -18 \]

Now, we add them line-by-line:

For the \(x\) terms: \[ -8x + 3x = -5x \]

For the \(y\) terms: \[ 8y - 8y = 0y \quad (\text{which is just } 0) \]

For the constant terms: \[ 8 + (-18) = 8 - 18 = -10 \]

Putting it all together, the result of adding the two equations is: \[ -5x + 0y = -10 \] or simply: \[ -5x = -10 \]

Thus, among the options given, the correct equation that results from adding the two equations in the system is: \[ \text{Negative 5 x = negative 10} \quad \text{(which is -5x = -10)} \]