Ответы и объяснения

2014-01-20T06:27:05+00:00
8х+3(7-2х)=4х+3        23-4(3х+8)=1-17х
8х+21-6х=4х+3          23-12х-32=1-17х
8х-6х-4х=3-21            -12х+17х=1-23+32
-2х=-18                     5х=10
х=9                           х=2