Question
Solve the system of equations.
4x−8y=−36
−6x+y=32
4x−8y=−36
−6x+y=32
Answers
Answered by
GPT-4o mini
To solve the system of equations:
1) \( 4x - 8y = -36 \) \\
2) \( -6x + y = 32 \)
We will first simplify the first equation and then solve the system.
### Step 1: Simplify the first equation
The first equation is \( 4x - 8y = -36 \).
We can simplify it by dividing every term by 4:
\[
x - 2y = -9
\]
### Step 2: Rewrite both equations
Now we will rewrite the system of equations:
1) \( x - 2y = -9 \) \\
2) \( -6x + y = 32 \)
### Step 3: Solve one of the equations for one variable
Let's solve the first equation for \( x \):
\[
x = 2y - 9
\]
### Step 4: Substitute into the second equation
Now substitute \( x \) in the second equation:
\[
-6(2y - 9) + y = 32
\]
### Step 5: Simplify and solve for \( y \)
Expanding this gives:
\[
-12y + 54 + y = 32
\]
Combine the \( y \) terms:
\[
-11y + 54 = 32
\]
Now, isolate \( y \):
\[
-11y = 32 - 54
\]
\[
-11y = -22
\]
Divide by -11:
\[
y = 2
\]
### Step 6: Substitute back to find \( x \)
Now plug \( y = 2 \) back into the equation we derived for \( x \):
\[
x = 2(2) - 9
\]
\[
x = 4 - 9
\]
\[
x = -5
\]
### Solution
So, the solution to the system of equations is:
\[
(x, y) = (-5, 2)
\]
### Step 7: Verification
To verify, we will substitute \( x = -5 \) and \( y = 2 \) back into the original equations:
1) \( 4(-5) - 8(2) = -20 - 16 = -36 \) (True) \\
2) \( -6(-5) + 2 = 30 + 2 = 32 \) (True)
Both equations are satisfied, thus the solution is correct.
The final answer is:
\[
\boxed{(-5, 2)}
\]
1) \( 4x - 8y = -36 \) \\
2) \( -6x + y = 32 \)
We will first simplify the first equation and then solve the system.
### Step 1: Simplify the first equation
The first equation is \( 4x - 8y = -36 \).
We can simplify it by dividing every term by 4:
\[
x - 2y = -9
\]
### Step 2: Rewrite both equations
Now we will rewrite the system of equations:
1) \( x - 2y = -9 \) \\
2) \( -6x + y = 32 \)
### Step 3: Solve one of the equations for one variable
Let's solve the first equation for \( x \):
\[
x = 2y - 9
\]
### Step 4: Substitute into the second equation
Now substitute \( x \) in the second equation:
\[
-6(2y - 9) + y = 32
\]
### Step 5: Simplify and solve for \( y \)
Expanding this gives:
\[
-12y + 54 + y = 32
\]
Combine the \( y \) terms:
\[
-11y + 54 = 32
\]
Now, isolate \( y \):
\[
-11y = 32 - 54
\]
\[
-11y = -22
\]
Divide by -11:
\[
y = 2
\]
### Step 6: Substitute back to find \( x \)
Now plug \( y = 2 \) back into the equation we derived for \( x \):
\[
x = 2(2) - 9
\]
\[
x = 4 - 9
\]
\[
x = -5
\]
### Solution
So, the solution to the system of equations is:
\[
(x, y) = (-5, 2)
\]
### Step 7: Verification
To verify, we will substitute \( x = -5 \) and \( y = 2 \) back into the original equations:
1) \( 4(-5) - 8(2) = -20 - 16 = -36 \) (True) \\
2) \( -6(-5) + 2 = 30 + 2 = 32 \) (True)
Both equations are satisfied, thus the solution is correct.
The final answer is:
\[
\boxed{(-5, 2)}
\]
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