19(y-9)=3(y+7),4(x-9)=3(x-8),3(2x-9)=5(x-4),7(3-2x)=15(1-x) - вопрос №855676819937493832954732151 от Kristina3002 06.04.2021 17:57

Question

Математика: 19(y-9)=3(y+7),4(x-9)=3(x-8),3(2x-9)=5(x-4),7(3-2x)=15(1-x)

Kristina3002 · Answer

19(у-9)=3(у+7)19у-171=3у+2119у-3у=21+17116у=192у=124(х-9)=3(х-8)4х-36=3х-244х-3х=-24+36х=123(2х-9)=5(х-4)6х-27=5х-206х-5х=-20+27х=77(3-2х)=15(1-х)21-14х=15-15х-14х+15х=15-21х=-6...