plz answer the circled questions
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Step-by-step explanation:
1. 6x-7x-2y
= -x-2y answer
2. 2y-3y-2-6+3y-8
= 2y-16
3. 3x -[x-4x-3y+5y]
=3x-x+4x+3y-5y
=6x-2y
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