September 2018 2 79 Report
Colocar el número que verifique las igualdades
a) ( x + 1 ) . ( - 7 ) = 21
b) 28 : ( x - 5 ) = -7
c) - 8 . ( x + 10 ) = -64
d) ( x - 4 ) : ( - 2 ) = 6
e) - 24 : ( x ) . 3 = 9
f) x . 4 : ( - 5 ) = 8
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