2(x-2.6)=8
x-2.6=4
x=6.6
5(x+1.5)=17.5
x+1.5=3.5
x=2
8(x-6.2)=41.6
x-6.2=5.2
x=11.4
(x-3)/2=7.5
x-3=15
x=18