7х+17,5+4х=29,8
7х+4х=29,8-17,5
11х=12 3/10
х=123/10:11
х=123/10*1/11
х=123/110
х=1 13/110
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7х+17,5+4х=29,8
7х+4х=29,8-17,5
11х=12 3/10
х=123/10:11
х=123/10*1/11
х=123/110
х=1 13/110