Mathematics · Oct / Nov 2021 · Paper 21 · Question 22
0580
As printed in the paper
Show the answer and mark scheme
22(a)[1]
1 x –2 or final answer 2 x [1]
22(b)[1]
2 3 [1]
22(c)[3]
1 nfww [3]
M1 for 3–2(4 – 3x) oe or better 3 x 1 −x = or 9 2 × 9 − ( 4 3 ) 9 oe or better 2
M1 for 3x + (their– 2)× (4 – 3x)= 1 oe or better 3 x 1 or their ( − 4 − 3 x ) = their oe or better 2 2
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