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Sol13101990
@Sol13101990
August 2022
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Упростите и найдите значение выражения:
а) 4(2х-10)-2(10-2х)+5х-14= , при х=-4х
б) -5(х+2у)-8х+4у-6= , при х=-1, у=3
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ВикторияКаледина
А)4*2-4*10-2*10+2*2х+5х-14=8-40-20+4х+5х-14=8-40-20-14+4х+5х=-66+9х=-66+9*(-4)=-66+(-36)=-102
б)-5х+(-5)*2у-8х+4у-6=-5х+(-10у)-8х+4у-6=-5х-8х+(-10у)+4у-6=-13х+(-6у)-6=-13*1+(-6)*3-6=-13+(-18)-6=-37
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Sol13101990
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б)-5х+(-5)*2у-8х+4у-6=-5х+(-10у)-8х+4у-6=-5х-8х+(-10у)+4у-6=-13х+(-6у)-6=-13*1+(-6)*3-6=-13+(-18)-6=-37