To determine which equation describes an infinite solution system with the given equation \( y = 4x - 3 \), we need to convert \( y = 4x - 3 \) into standard form and look for equivalent equations.
The given equation is: \[ y = 4x - 3 \]
Rearranging, we get: \[ 4x - y - 3 = 0 \rightarrow 4x - y = 3 \]
Now, we can form a standard linear equation: \[ 4x - y = 3 \]
Next, we need to check each of the given equations to see if they are equivalent to this.
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For \( 2y - 8x = 6 \):
- Rearranging gives \( y = 4x + 3 \), which is not equivalent.
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For \( -2y + 8x = -6 \):
- Rearranging gives \( 2y = 8x + 6 \) or \( y = 4x + 3 \), which is not equivalent.
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For \( 2y + 8x = -6 \):
- Rearranging gives \( 2y = -8x - 6 \) or \( y = -4x - 3 \), which is not equivalent.
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For \( 2y - 8x = -6 \):
- Rearranging gives \( 2y = 8x - 6 \) or \( y = 4x - 3 \), which is equivalent!
Thus, the equation that describes an infinite solution system is: \[ \boxed{2y - 8x = -6} \]