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Please help me simplifying algebraic expressions containing parentheses brackets and braces I need help on number four.pls help this needs to be done very soon pls pls

Please help me simplifying algebraic expressions containing parentheses brackets and braces I need help on number fourpls help this needs to be done very soon p class=

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csms4

Answer:  x + y - 9

Step-by-step explanation:

3x−(y+3x−(2y+x))−2−7

=3x+−y+−3x+2y+x+−2+−7

Combine Like Terms:

=3x+−y+−3x+2y+x+−2+−7

=(3x+−3x+x)+(−y+2y)+(−2+−7)

=x+y+−9

Solution: x+y−9

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