1-х/2 × 30/1 + 2+3х/5 × 30/1 + х/6 × 30/1
15-х + 12+3х + 5х = 1
-х+3х+5х=1-15-12
2х+5х=-14-12
7х=-26
х=-26:7
х=-3 5/7
1-х/2 × 30/1 + 2+3х/5 × 30/1 + х/6 × 30/1
15-х + 12+3х + 5х = 1
-х+3х+5х=1-15-12
2х+5х=-14-12
7х=-26
х=-26:7
х=-3 5/7