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3naika
@3naika
June 2022
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решите уравнения по действиям
(8x-3)-(3x+4)=5
(x+2)5-6=49
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Answers & Comments
Lalyka
1) раскрываем скобки: 8х - 3 - 3х - 4 = 5
5х - 7 = 5
5х = 12
х = 12:5
х = 2 целые 2/5
2) 5х + 10 - 6 = 49
5х = 49 - 10 + 6 = 45
х = 45/5
х = 9
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3naika
почему 5x!!
Lalyka
8х - 3х = х (8 - 3) = 5х
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Answers & Comments
5х - 7 = 5
5х = 12
х = 12:5
х = 2 целые 2/5
2) 5х + 10 - 6 = 49
5х = 49 - 10 + 6 = 45
х = 45/5
х = 9