5.6x=18减4.4x
5.6x+4.4x=18
10x=18
x=18÷10
x=1.8
5分之8除以(x减0.45)等于5分之16
x-0.45=8/5÷16/5
x-0.45=0.5
x=0.45+0.5
x=0.95