1.x-9=0.6
x=9+0.6
x=9.6
2.x+12.7=20.1
x=20.1-12.7
x=7.4
3.x-6.7=12.2
x=6.7+12.2
x=18.9
4.x+32=76.4
x=76.4-32
x=43.4