{|5 (7х+2у) -11у=6(2х+у)+2 {|33+3(6х-5у)=3(х+2у)-5у - вопрос №57211622333653252601894 от Aleksa413 04.01.2020 20:13

Question

Математика: {|5 (7х+2у) -11у=6(2х+у)+2 {|33+3(6х-5у)=3(х+2у)-5у решите

Aleksa413 · Answer

5 (7х+2у) -11у=6(2х+у)+235х+10у-11у=12х+6у+223х-7у=27у=23х-2у=(23х-2)/733+3(6х-5у)=3(х+2у)-5у33+18х-15у=3х+6у-5у15х-16у=-3315х-16(23х-2)/7=-33   домножим на 7105х-16(23х-2)=-231105х-368х+32=-231-263х=-263х=1у=(23*1-2)/7=21/7=3...