Tangle Trap – Level 1 – Hard

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Home » Tangle Trap – Level 1 – Hard

Untangle the following equation, to find the value of x.

Enter the value of x into the Answer box.

x(x – 8) + 5x + (x + 1)² + (x + 6)(x + 7) – (x + 7)² + 9 = x² + x(x – 8) – x + 3

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Additional instructions for Tangle Trap (Level 1, Hard)

Tangle Trap – Hard

Proof-check finish: if your final answer doesn’t “feel” right, verify equivalence.

Pick an easy value like x=0, x=1, and x=2.
Evaluate the original expression and your simplified expression.
The outputs must match every time.

If they don’t match: the error is almost always in a bracket expansion or a missed sign flip.

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