а)10а+в-10в-а=9а-9в
б)-8у+7х+6у+7х=-2у+14х
в)2/7х-4,9у-5/14х+2/3у=2/7х`²-4,9у-5/14х+2/3у`³=4/14х-4/9у-5/14х+6/9у=-1/14х-2/9у
г)-6а+5а-х+4=-а-х-4
е)23х-23+40+4х=27х+17
а)10а+в-10в-а=9а-9в
б)-8у+7х+6у+7х=-2у+14х
в)2/7х-4,9у-5/14х+2/3у=2/7х`²-4,9у-5/14х+2/3у`³=4/14х-4/9у-5/14х+6/9у=-1/14х-2/9у
г)-6а+5а-х+4=-а-х-4
е)23х-23+40+4х=27х+17