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Simplify. $$\[ 7 c-5 d+c+3 d \]$$ .............................................

Mathematics
IGCSE&ALevel
CAIE
Exam No：0580_s25_qp_21 Year：2025 Question No：1

Answer:



Knowledge points:

C2.1.1 Use letters to express generalised numbers and express basic arithmetic processes algebraically.

Solution:

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