To complete the equation so that it has no solution, we need to make sure both sides are equal for some values of \( x \), but lead to a contradiction.
One way to do this is to set the left side equal to a value that cannot be achieved by the right side.
For example:
\( 5x + 12 = 5 \)
Now, setting up the equation:
\( 5x + 12 = x + 9 \)
If we simplify this:
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Subtract \( x \) from both sides: \[ 5x - x + 12 = 9 \] \[ 4x + 12 = 9 \]
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Subtract 12 from both sides: \[ 4x = 9 - 12 \] \[ 4x = -3 \]
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Divide both sides by 4: \[ x = -\frac{3}{4} \]
Now, let's check:
If we want no solution, we make the left side unusable, so instead we could say:
\( 5x + 12 = 5x + 10 \)
Now, forming the equation:
\( 5x + 12 = x + 9 \)
Implying:
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Subtract \( x \) from both sides: \[ 5x - x + 12 = 9 \] \[ 4x + 12 = 9 \]
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Subtract 12 from both sides: \[ 4x = 9 - 12 \] \[ 4x = -3 \]
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We assume no suitable 'x' should be possible.
Hence the completed equation:
Final Equation: \[ 5x + 12 = 5x + 10 \]
This means it can never be true.