Ответ:
7х-9=3х+11
7х-3х=11+9
4х=20
х=5
7х-3х=8+11
4х=19
х=4,75
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Ответ:
7х-9=3х+11
7х-3х=11+9
4х=20
х=5
7х-9=3х+11
7х-3х=8+11
4х=19
х=4,75