7х-(3+2х)=х+9 13-(2х-5)=х-3 3х-(10-9х)=22х 26-(17-2х)=5х - вопрос №3468844732913253310922261725 от аленагут1 10.09.2020 08:38

Question

Математика: 7х-(3+2х)=х+9 13-(2х-5)=х-3 3х-(10-9х)=22х 26-(17-2х)=5х

аленагут1 · Answer

7х-3-2х=х+97х - 2х - х = 9 + 34х = 12х = 313 - 2х + 5 = х - 3- 2х - х = - 13 - 5 - 3- 3х = - 21х = 73х - 10 + 9х = 22х3х + 9х - 22х = 10- 10х = 10х = - 126 - 17 + 2х = 5х2х - 5х = 17 - 26- 3х = - 9х = 3...