Solve using substitution.

y = 3x − 4
y = –2x + 1

1 answer

To solve the system of equations using substitution, we have the following equations:

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

Since both equations are equal to \( y \), we can set them equal to each other:

\[ 3x - 4 = -2x + 1 \]

Now, we will solve for \( x \).

  1. Add \( 2x \) to both sides:

\[ 3x + 2x - 4 = 1 \]

This simplifies to:

\[ 5x - 4 = 1 \]

  1. Next, add \( 4 \) to both sides:

\[ 5x = 5 \]

  1. Now, divide by \( 5 \):

\[ x = 1 \]

Now that we have \( x \), we can substitute \( x = 1 \) back into either of the original equations to find \( y \). We'll use the first equation:

\[ y = 3(1) - 4 \]

This simplifies to:

\[ y = 3 - 4 = -1 \]

So the solution to the system of equations is:

\[ (x, y) = (1, -1) \]

Final Answer: (1, -1)

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