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August 2022
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Решите уравнения пожалуйста
(3 1/2х-1 5/14)*42=6
8,2:х+1 7/12=7 5/18
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Мира115678
А) (3 1/2х-1 5/14)×42=6
3 1/2х-1 5/14×42=6
3 1/2х-57=6
3 1/2х=6+57
3 1/2х=63
х=63:3 1/2
х=63:7/2
х=63×2/7
х=18
б) 8,2х+1 7/12=7 5/18
8,2х=7 5/18-1 7/12
8,2х=7 10/36-1 21/36
8,2х=6 46/36-1 21/36
8,2х=5 25/36
х=5 25/36:8,2
х=180/36:8 2/10
х=180/36:82/10
х=180/36×10/82
х=18/2952=9/1476=3/492=1/164
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Answers & Comments
3 1/2х-1 5/14×42=6
3 1/2х-57=6
3 1/2х=6+57
3 1/2х=63
х=63:3 1/2
х=63:7/2
х=63×2/7
х=18
б) 8,2х+1 7/12=7 5/18
8,2х=7 5/18-1 7/12
8,2х=7 10/36-1 21/36
8,2х=6 46/36-1 21/36
8,2х=5 25/36
х=5 25/36:8,2
х=180/36:8 2/10
х=180/36:82/10
х=180/36×10/82
х=18/2952=9/1476=3/492=1/164