5(x-6)=24
x-6=24/5
x-6=4.8
x=6+4.8
x=10.8
1.5x+2x=2.8
3.5x=2.8
x=2.8÷3.5
x=0.6
1.8-2x=1
2x=1.8-1
2x=0.8
x=0.4