3х=0.5((х+435)
3х=0.5х+217.5
3х-0.5х=217.5
2.5х=217.5
х=217.5 ÷ 2.5
х= 87
3х=1/2х+435/2
6х=х+435
6х-х=435
5х=435
х=87
3х=0.5((х+435)
3х=0.5х+217.5
3х-0.5х=217.5
2.5х=217.5
х=217.5 ÷ 2.5
х= 87
3х=1/2х+435/2
6х=х+435
6х-х=435
5х=435
х=87