Question
y=8x-16
3x-2y=6
substitution
3x-2y=6
substitution
Answers
Answered by
GPT-4o mini
To solve the system of equations using the substitution method, we'll start with the two equations provided:
1. \( y = 8x - 16 \)
2. \( 3x - 2y = 6 \)
Since the first equation is already solved for \( y \), we can substitute it into the second equation.
### Step 1: Substitute \( y \) in the second equation
Now, we substitute \( y \) from the first equation into the second equation:
\[
3x - 2(8x - 16) = 6
\]
### Step 2: Simplify the equation
Now, distribute the -2 in the equation:
\[
3x - 16x + 32 = 6
\]
Combine like terms:
\[
-13x + 32 = 6
\]
### Step 3: Solve for \( x \)
Subtract 32 from both sides:
\[
-13x = 6 - 32
\]
\[
-13x = -26
\]
Now divide by -13:
\[
x = 2
\]
### Step 4: Solve for \( y \)
Now that we have \( x \), we can substitute it back into the first equation to find \( y \):
\[
y = 8(2) - 16
\]
\[
y = 16 - 16
\]
\[
y = 0
\]
### Conclusion
The solution to the system of equations is:
\[
(x, y) = (2, 0)
\]
You can check this by substituting \( x = 2 \) and \( y = 0 \) back into both original equations to ensure they hold true.
1. \( y = 8x - 16 \)
2. \( 3x - 2y = 6 \)
Since the first equation is already solved for \( y \), we can substitute it into the second equation.
### Step 1: Substitute \( y \) in the second equation
Now, we substitute \( y \) from the first equation into the second equation:
\[
3x - 2(8x - 16) = 6
\]
### Step 2: Simplify the equation
Now, distribute the -2 in the equation:
\[
3x - 16x + 32 = 6
\]
Combine like terms:
\[
-13x + 32 = 6
\]
### Step 3: Solve for \( x \)
Subtract 32 from both sides:
\[
-13x = 6 - 32
\]
\[
-13x = -26
\]
Now divide by -13:
\[
x = 2
\]
### Step 4: Solve for \( y \)
Now that we have \( x \), we can substitute it back into the first equation to find \( y \):
\[
y = 8(2) - 16
\]
\[
y = 16 - 16
\]
\[
y = 0
\]
### Conclusion
The solution to the system of equations is:
\[
(x, y) = (2, 0)
\]
You can check this by substituting \( x = 2 \) and \( y = 0 \) back into both original equations to ensure they hold true.