1) -(4+3а)+(5а-7)= -4-3а+5а-7=2а-11
2)2(3-х)-6(х+2)= 6-2х-6х-12= -6-8х
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1) -(4+3а)+(5а-7)= -4-3а+5а-7=2а-11
2)2(3-х)-6(х+2)= 6-2х-6х-12= -6-8х