УПРОСТИТЕ ВЫРАЖЕНИЯ:
А) -5а-2(7-а)
Б) 4(2-3x)+5(2x-3)
В) -6(8х-5)+7(4-x)
Г) -12 (7•2d)-9(7d-5)-3(15+8d)
Даю 20 балов помогите
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