Systems of Linear Equations Unit Test

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Question
Solve the system of equations.
−6x+2y=−32

4x+3y=−9
(1 point)
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,
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1 answer

To solve the system of equations:

  1. \(-6x + 2y = -32\)
  2. \(4x + 3y = -9\)

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

First, we can simplify the first equation. Divide the entire equation by 2:

\[ -3x + y = -16 \]

Now we can rewrite the system of equations:

  1. \(-3x + y = -16\)
  2. \(4x + 3y = -9\)

Next, we can express \(y\) from the first equation:

\[ y = 3x - 16 \]

Now, substitute \(y\) in the second equation:

\[ 4x + 3(3x - 16) = -9 \]

Distributing:

\[ 4x + 9x - 48 = -9 \]

Combine like terms:

\[ 13x - 48 = -9 \]

Add 48 to both sides:

\[ 13x = 39 \]

Divide by 13:

\[ x = 3 \]

Now, substitute \(x = 3\) back into the equation for \(y\):

\[ y = 3(3) - 16 \] \[ y = 9 - 16 \] \[ y = -7 \]

So, the solution to the system of equations is:

\[ \boxed{(3, -7)} \]