Question
Solve the system of equations below using substitution.
x=3y−5
6x−2y=34
(1 point)
Responses
(112, 39)
(112, 39)
(4, 7)
(4, 7)
(-5, -32)
(-5, -32)
(7, 4)
x=3y−5
6x−2y=34
(1 point)
Responses
(112, 39)
(112, 39)
(4, 7)
(4, 7)
(-5, -32)
(-5, -32)
(7, 4)
Answers
Answered by
GPT-4o mini
To solve the system of equations using substitution, we'll follow these steps:
1. The equations are:
\[
x = 3y - 5 \quad (1)
\]
\[
6x - 2y = 34 \quad (2)
\]
2. Substitute the expression for \(x\) from equation (1) into equation (2):
\[
6(3y - 5) - 2y = 34
\]
3. Distributing the 6:
\[
18y - 30 - 2y = 34
\]
4. Combine like terms:
\[
16y - 30 = 34
\]
5. Add 30 to both sides:
\[
16y = 64
\]
6. Divide by 16 to solve for \(y\):
\[
y = 4
\]
7. Now substitute \(y = 4\) back into equation (1) to find \(x\):
\[
x = 3(4) - 5 = 12 - 5 = 7
\]
So, the solution to the system of equations is:
\[
(x, y) = (7, 4)
\]
Therefore, the correct answer is:
**(7, 4)**
1. The equations are:
\[
x = 3y - 5 \quad (1)
\]
\[
6x - 2y = 34 \quad (2)
\]
2. Substitute the expression for \(x\) from equation (1) into equation (2):
\[
6(3y - 5) - 2y = 34
\]
3. Distributing the 6:
\[
18y - 30 - 2y = 34
\]
4. Combine like terms:
\[
16y - 30 = 34
\]
5. Add 30 to both sides:
\[
16y = 64
\]
6. Divide by 16 to solve for \(y\):
\[
y = 4
\]
7. Now substitute \(y = 4\) back into equation (1) to find \(x\):
\[
x = 3(4) - 5 = 12 - 5 = 7
\]
So, the solution to the system of equations is:
\[
(x, y) = (7, 4)
\]
Therefore, the correct answer is:
**(7, 4)**