(х+58)-37=91. (63-у)+109=121. 69-(у-28)=13. 103-(z+47)=54 - вопрос №7850666583791631091216928131034754 от zhenyaamelkov2 15.05.2020 07:27

Question

Математика: (х+58)-37=91. (63-у)+109=121. 69-(у-28)=13. 103-(z+47)=54

zhenyaamelkov2 · Answer

1) (х+58)-37=91х+58 = 91+37х = 128 - 58х = 702) (63-у)+109 = 12163-у = 121-10963-у = 12у = 63-12у = 513) 63-(у-28)=1363-у+28=13-у = 13-63-28-у = -78у = 784) 103-(z+47)=54103-z-47 = 54-z = 54-103+47-z = -2z = 2...