1.
-10х+128 = -74х
64х = -128
х = -2
2.
-9у+3 = 3(8у-45)
-9у+3 = 24у-135
33у = 138
у=4,(18)
3.
-50(-3х+10) = -200
150х-500 = -200
150х=300
х=2
4.
11(8+9х) = 88+х
88+99х = 88+х
98х=0
х=0
5.
-20(-10у+4) = 120
200у-80 = 120
200у = 200
у = 1
6.
-15(-9-2х) = 15
135+30х = 15
30х = -120
х = -4