solve the system of quations. -4x + 6y = 38

x - 5y = -20

1 answer

To solve the system of equations:

  1. Equation 1: \(-4x + 6y = 38\)
  2. Equation 2: \(x - 5y = -20\)

We can use the substitution or elimination method. Here, I will use the substitution method.

First, we can express \(x\) in terms of \(y\) from Equation 2:

\[ x = 5y - 20 \]

Next, we can substitute this expression for \(x\) into Equation 1:

\[ -4(5y - 20) + 6y = 38 \]

Distributing \(-4\):

\[ -20y + 80 + 6y = 38 \]

Combine like terms:

\[ -14y + 80 = 38 \]

Now, isolate \(y\):

\[ -14y = 38 - 80 \] \[ -14y = -42 \] \[ y = \frac{-42}{-14} = 3 \]

Now that we have \(y\), substitute it back into the expression for \(x\):

\[ x = 5(3) - 20 \] \[ x = 15 - 20 \] \[ x = -5 \]

The solution to the system of equations is:

\[ x = -5, \quad y = 3 \]

So, the solution is \((-5, 3)\).