1)4х+5(3-2х)=5-11х
4х+15-10х=5-11х
4х-10х+11х=5-15
х=-2.
2)19-2(3х+8)=2х-37
19-(6х+16)=2х-37
19 - 6х-16=2х-37
-6х-2х=-37-19+16
х=5
3)8х+3(7-2х)=4х+3
8х+21-6х=4х+3
8х-6х-4х=3-21
-2х=-18
х=9
4)23-4(3х+8)=1-17х
23 - (12х+32)=1 - 17х
23-12х-32=1-17х
-12х+17х=1-23+32
5х=10
х=2