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nastyarodionov
@nastyarodionov
September 2021
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Помогите решить 41номер пожалуйста:(
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nKrynka
Решение
1) 8,3 + 2(a - 1,5) = 8,3 + 2a - 3 = 5,8 + 2a
б) 5a + 3(2 - a) = 5a + 6 - 3a = 2a + 6
в) 7,4(a + b) + 0,5(a - b) = 7,4a + 7,4b + 0,5a - 0,5b = 7,9a + 6,9b
г) 3(2a + 1) + 2(3a + 1) = 6a + 3 + 6a + 2 = 12a + 5
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nastyarodionov
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Answers & Comments
1) 8,3 + 2(a - 1,5) = 8,3 + 2a - 3 = 5,8 + 2a
б) 5a + 3(2 - a) = 5a + 6 - 3a = 2a + 6
в) 7,4(a + b) + 0,5(a - b) = 7,4a + 7,4b + 0,5a - 0,5b = 7,9a + 6,9b
г) 3(2a + 1) + 2(3a + 1) = 6a + 3 + 6a + 2 = 12a + 5