1)11х=6-(4х+66)

11х=6-4х-66

15х=6-66

15х=-60

х=-60/15

х=-4

2)9х=5х-(72-2х)

9х=5х-72+2х

9х=7х-72

9х-7х=-72

2х=-72

х=-72/2

х=-36