а) 2/3(1.5х + 0.6) - 0.8(5/12х - 0.5)=1

б) 11 - 3 |2х + 1| = 5

2/3(1.5х + 0.6) - 0.8(5/12х - 0.5)=1
2/3*1.5х + 0.4 - 0.8*5/12х + 0.4=1
х + 0.4 - 0.8*5/12х + 0.4=1
х + 0.4 - 8/10*5/12х + 0.4=1
х - 2/6х =1-0.8
4/6х =0.2
х=1/5*2/3
х=2/15






11 - 3 |2х + 1| = 5
- 6х -3 = -6
6х = 9
х=9/6
х=1.5