А) (а+2)*5-12=5а+10-12=5а+(-2)
Б) 13+(11-а)*4=13+44-4а=57+(-4а)
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А) (а+2)*5-12=5а+10-12=5а+(-2)
Б) 13+(11-а)*4=13+44-4а=57+(-4а)