1) а) 5х+3*(х-1)=6х+11
б) 3х-5*(2-х)=54
в) 8*(у-7)-3*(2у+9) 15
д) 6+(2-4х)+5=3*(1-3х)
2) 3х*(2х-1)-6х*(7+х)+90
3) а) х/4+х/3=14
в) у/4=у-1
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