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4.a) (3-2x)-(x+4)-(2x+5)=(3x-4)-(5x+7)

b)(4-x)-(2x+3)+(x-4)=-(2x-3)-(x+7)

c) (4x-5) + (x-7)-(2x-8)=(-3x+4)-(x-6)

d)-(4-2x)-(2x+4)=(3x-1)+(2x-5)-(7-3x)


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