Ответ:
25х+2(3х-1)=91
25х+6х-2=91
31х-2=91
31х=91+2
31х=93
х=93:31
Х=3
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Ответ:
25х+2(3х-1)=91
25х+6х-2=91
31х-2=91
31х=91+2
31х=93
х=93:31
Х=3