22.8-2.5x=1.2
22.8-1.2=2.5x
21.6=2.5x
x=21.6÷2.5
x=8.64
7.2x-12.32=5.8
7.2x=5.8+12.32
7.2x=18.12
x=18.12÷7.2
x=151/60