Ответ:
4(3х+1)+9=4(х-3)-7
12х+4+9=4х-12-7
12х+13=4х-19
12х-4х=-19-13
8х=-32
х=-32:8
х=-4
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Ответ:
4(3х+1)+9=4(х-3)-7
12х+4+9=4х-12-7
12х+13=4х-19
12х-4х=-19-13
8х=-32
х=-32:8
х=-4