Chain Reaction – Level 1 – Medium

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Each answer you find is used inside the next question. Work through the full chain carefully – if you get one wrong, it affects the rest!

1) Solve: 21 – x = 31 – 2x

A =

2) Use your answer from Q1 as “a”. Now solve: 4a – x + 0 = 31

B =

3) Use your answer from Q2 as “b”. Now simplify: (x + 5)(x + b) – what is the coefficient of x?

C =

4) Use your answer from Q3 as “c”. Now solve: x + (x + c)/2 = -11

D =

5) Use your answer from Q4 as “d”. Now factorise: x² – dx + 36

E =

Additional instructions for Chain Reaction (Level 1, Medium)

Chain Reaction – Medium

Use mini-checkpoints: the best way to avoid a late-stage collapse is to validate at key points.

After each “solve” step, quickly substitute your value back in to see if it balances.
After each “simplify” step, check you’ve handled signs and brackets correctly.
After each “coefficient/constant” step, confirm you’ve extracted the right piece (e.g. the coefficient of x, not the constant).

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