Ответы на вопрос:
1) (22+-7)a=5a 2) (c+84)-48= (84-48)c=36c 3)69-(m+12)=(69-12)m=57m 4) 316-(95+b)=(316-95)b=221b
I) 1.3х + 3.8х-0.03=2.01 1.3х + 3.8х = 2.01 + 0.035.1х = 2.04х = 2.04/5.1х = 0.4проверка: 5.1 * 0.4 = 2.042.04 = 2.04ответ: х=0.4ii) 6.72/(203.2 -х)=2.1203.2 - x = 6.72/2.1203.2 - х = 3.2 х = 203.2 - 3.2х = 200проверка: 6.72/(203.2 - 200) = 2.16.72/3.2 = 2.12.1 = 2.1ответ: х=200
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