Ответ:
5(х+3)=8(10-х)
5х+15=80-8х
5х+8х=80-15
13х=65
х=65:13
х=5
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Ответ:
5(х+3)=8(10-х)
5х+15=80-8х
5х+8х=80-15
13х=65
х=65:13
х=5