Ответ:
8(х-4)+3(2-х)=-21
8х-32+3(2-х)=-21
8х-33+6-3х=-21
5х-32+6=-21
5х-26=-21
5х=-21-26
5х=5
х=1
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Ответ:
8(х-4)+3(2-х)=-21
8х-32+3(2-х)=-21
8х-33+6-3х=-21
5х-32+6=-21
5х-26=-21
5х=-21-26
5х=5
х=1