Ответ:
179х-159х+600=2020
179х-159х=2020-600
179х-159х=1420
20х=1420
х=1420:20
х=71
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Ответ:
179х-159х+600=2020
179х-159х=2020-600
179х-159х=1420
20х=1420
х=1420:20
х=71