3х=0.5((х+435)
3х=0.5х+217.5
3х-0.5х=217.5
2.5х=217.5
х=217.5 ÷ 2.5
х= 87
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3х=0.5((х+435)
3х=0.5х+217.5
3х-0.5х=217.5
2.5х=217.5
х=217.5 ÷ 2.5
х= 87