7(x-19)=133
7х-133=133
7х=133+133
7х=266
х=266:7
х=38
7(38-19)=133 (это проверка)
7·19=133
133=133
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7(x-19)=133
7х-133=133
7х=133+133
7х=266
х=266:7
х=38
7(38-19)=133 (это проверка)
7·19=133
133=133
удачи