①x+10.8=40.8
②x÷1.2=60
③1-x=0.25
④6x+6=306
⑤75x-68x=47.6
⑥※x-4+9=30.5
⑦30x+15x=22.5
⑧16×0.5+3x=14
⑨※(x-4)×0.25=10