1) 7х-(3+2х)=х+9 2) 13-(2х-5)=х-3 3) 3х-(10-9)=22х - вопрос №70258401732921325333109224261725 от adelyavalieva1 13.08.2021 15:06

Question

Математика: 1) 7х-(3+2х)=х+9 2) 13-(2х-5)=х-3 3) 3х-(10-9)=22х 4) 26-(17-2х)=5х

adelyavalieva1 · Answer

7х-(3+2х)=х+9 13-(2х-5)=х-3 3х-(10-9)=22х 26-(17-2х)=5х
7х-3-2х=х+9 13-2х+5=х-3 3х-10+9=22х 26-17+2х=5х
7х-2х-х=9+3 -2х-х=-3-13-5 3х-22х=10-9 2х-5х=-26+17
4х=12 -3х= -24 -19х=1 -3х=-3
х=3 х=8 х=-19 х=1