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100-(549-421-9×9+3×7)=

Răspuns :

100-(549-421-9×9+3×7)
100-(549-421-81+21)
100-(128-81+21)
100-(47+21)
100-68
32
100-(549-421-9x9+3x7)=
100-(128-81+21)=
100- (37+21)=
100-58=42