Answer:
0.8<x<1.1
Step-by-step explanation:
Take 0.9<2x-0.7<1.5 add everything by 0.7 to get 1.6<2x<2.2 then divide everything by 2 to get 0.8<x<1.1
x=4
Since x+2 is half the size of 3x:
2(x+2)=3x
2x+4=3x
4=3x-2x