Mathematics · Oct / Nov 2025 · Paper 41 · Question 26
0580
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0580/41/O/N/25 © UCLES 2025 26 Solve the simultaneous equations. You must show all your working. y x x 2 3 7 2 ¤ Å Å y x 2 7 ¤ Å x ¤ , y ¤ x ¤ , y ¤ [4]
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[ ] 2 − = 2 x 5 x 0 or better or [ ] 2 + + = or better 2 y 18 y 28 0 x = 0, y = –7 x = 2.5, y = –2 [6]
M2 M1 for 2 − − = − oe or for 2 x 3 x 7 2 x 7 + 2 + y 7 y 7 = − − y 2 3 7 2 2
B2 B1 for x = 0, y = –7, or for x = 0 and x = 2.5 or for x = 2.5, y = –2 or for y = –2 and y = –7 If M1B0 or M2B0 scored then
SC1 for correct substitution seen of both of their x-values = − − or their y-values into y 2 x 2 3 x 7 = − or y 2 x 7
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