1. a) (53-14).(-7)+23.(14-53) b) (-59).(69-43)-69.(43-59) 2. a) (X+2).(X-3)=0 b) (2X-5)^2=9 c) 12-(30-X)= -23 3. 2754:[112-(X+5)]=27

1. a) (53-14).(-7)+23.(14-53) b) (-59).(69-43)-69.(43-59) 2. a) (X+2).(X-3)=0 b) (2X-5)^2=9 c) 12-(30-X)= -23 3. 2754:[112-(X+5)]=27
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