December 2018 1 8 Report
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a) b)
4a+(3b+2)= 7a-(2b+1)=
7a+(2b-4)= 2a-(6b-8c)=
6x+t+(6y+7)= 4u-(w+3v)=
x+93y-26z)= 9u-(4w-v)=
b+(c+6d)= x-(2y-z)=

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