August 2021 0 6 Report
Помогите, Алгебра 1. Найти неизвестный член пропорции:
х:7 = 9:3
2. Решить уравнение:
1) 10(2х-1) -9 (х-2) +4(5х+8) = 71
2) 7-х(3+х) = (х+2)(5-х)
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