2x − 7y = –4

–2x + 10y = –2

1 answer

To solve the system of equations:

  1. \(2x - 7y = -4\) (Equation 1)
  2. \(-2x + 10y = -2\) (Equation 2)

We can use the method of elimination or substitution. Here, we'll use elimination.

First, let's add both equations together to eliminate \(x\):

\[ (2x - 7y) + (-2x + 10y) = -4 + (-2) \]

This simplifies to:

\[ 0x + 3y = -6 \]

Which simplifies further to:

\[ 3y = -6 \]

Now, divide both sides by 3:

\[ y = -2 \]

Now, we can substitute \(y = -2\) back into one of the original equations to find \(x\). We'll use Equation 1:

\[ 2x - 7(-2) = -4 \]

Simplifying this, we get:

\[ 2x + 14 = -4 \]

Now, isolate \(x\):

\[ 2x = -4 - 14 \] \[ 2x = -18 \] \[ x = -9 \]

So the solution for the system of equations is:

\[ x = -9, \quad y = -2 \]

Thus, the solution is \((-9, -2)\).