2х•2х-3х+104=-3х•-3х-48+44х-3х+104=9х-48+44х-3х-9х=-48-104+4-8х=-148х=-148:-8х=18,5
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2х•2х-3х+104=-3х•-3х-48+44х-3х+104=9х-48+44х-3х-9х=-48-104+4-8х=-148х=-148:-8х=18,5