question-1,2,4,7 and Chapter name algebraic expression
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Step-by-step explanation:
1. 8(a-2)
=8a-16
2. 5+2(a-2)
=5+2a-4
=1+2a
4. 7a-8(a+5)
=7a-8a-40
= -a-40
7. 8a-(b+7)+2(a-b)
=8a-b-7+2a-2b
=10a-3b-7
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