question-1,2,4,7 and chapter name - algebraic expression
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Step-by-step explanation:
1. a=2
2. a= 1/2
4. a = -5
7.
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1. 8-2a
2. 7-2a
4. 8a-3
5. -4p-q
2. 7-2a
4. 8a-3
5. -4p-q
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