Carter Warner
12/31/2023 · Middle School
Directions: Write the linear equation in Standard Form. \( y=x+8 \) Incorrect Answer Given: \( x=y-8 \) Why is this incorrect? Answer fails to be in the form: \( A x+B y=C \) Answer fails to make sure \( A, B, C \) are not fractions (or decim:
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Step-by-step Solution
To convert the equation \( y = x + 8 \) into standard form, we need to rearrange it into the form \( Ax + By = C \), where \( A \), \( B \), and \( C \) are integers, and \( A \) is non-negative.
Starting with the given equation:
1. **Original equation**:
\[
y = x + 8
\]
2. **Rearranging to standard form**:
Subtract \( x \) from both sides:
\[
-x + y = 8
\]
3. **Multiplying through by -1** (to make \( A \) positive):
\[
x - y = -8
\]
Now, we have the equation in standard form \( Ax + By = C \) where:
- \( A = 1 \)
- \( B = -1 \)
- \( C = -8 \)
Thus, the correct standard form of the equation is:
\[
x - y = -8
\]
### Why the Incorrect Answer is Incorrect:
The incorrect answer given was \( x = y - 8 \). This is not in standard form because:
1. It does not have the form \( Ax + By = C \).
2. It can be rearranged to \( x - y = -8 \), which is the correct standard form.
Additionally, the incorrect answer does not ensure that \( A, B, C \) are integers in the required format. The standard form requires all coefficients to be integers, and the rearrangement to standard form is necessary to meet this requirement.
Quick Answer
The correct standard form of \( y = x + 8 \) is \( x - y = -8 \). The incorrect answer \( x = y - 8 \) is not in standard form because it does not follow the format \( Ax + By = C \) and does not ensure \( A, B, C \) are integers.
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