Question
Solve the system of linear equations using the elimination method. Write your answer as a coordinate on the xy
-coordinate plane.
y+3x=−2
2y−3x=14
(1 point)
Responses
(-2, 4)
(-2, 4)
(-6, 16)
(-6, 16)
(4, -2)
(4, -2)
(6, 16)
(6, 16)
-coordinate plane.
y+3x=−2
2y−3x=14
(1 point)
Responses
(-2, 4)
(-2, 4)
(-6, 16)
(-6, 16)
(4, -2)
(4, -2)
(6, 16)
(6, 16)
Answers
GPT-4o mini
To solve the system of equations using the elimination method, we have the following equations:
1. \( y + 3x = -2 \)
2. \( 2y - 3x = 14 \)
First, let's manipulate these equations to eliminate one of the variables.
We can add the two equations to eliminate \( x \). To do this, we can first rearrange the first equation to isolate \( y \):
1. \( y = -2 - 3x \)
Now, substitute this expression for \( y \) into the second equation:
\[
2(-2 - 3x) - 3x = 14
\]
Now, distribute and simplify:
\[
-4 - 6x - 3x = 14
\]
\[
-4 - 9x = 14
\]
Now, add 4 to both sides:
\[
-9x = 18
\]
Divide by -9:
\[
x = -2
\]
Next, substitute \( x = -2 \) back into the first equation to find \( y \):
\[
y + 3(-2) = -2
\]
\[
y - 6 = -2
\]
\[
y = 4
\]
Thus, the solution to the system of equations is
\[
(x, y) = (-2, 4)
\]
As a coordinate on the xy-coordinate plane, the solution is \((-2, 4)\).
Therefore, the correct response is:
**(-2, 4)**
1. \( y + 3x = -2 \)
2. \( 2y - 3x = 14 \)
First, let's manipulate these equations to eliminate one of the variables.
We can add the two equations to eliminate \( x \). To do this, we can first rearrange the first equation to isolate \( y \):
1. \( y = -2 - 3x \)
Now, substitute this expression for \( y \) into the second equation:
\[
2(-2 - 3x) - 3x = 14
\]
Now, distribute and simplify:
\[
-4 - 6x - 3x = 14
\]
\[
-4 - 9x = 14
\]
Now, add 4 to both sides:
\[
-9x = 18
\]
Divide by -9:
\[
x = -2
\]
Next, substitute \( x = -2 \) back into the first equation to find \( y \):
\[
y + 3(-2) = -2
\]
\[
y - 6 = -2
\]
\[
y = 4
\]
Thus, the solution to the system of equations is
\[
(x, y) = (-2, 4)
\]
As a coordinate on the xy-coordinate plane, the solution is \((-2, 4)\).
Therefore, the correct response is:
**(-2, 4)**