`20160:x=56`
`x=20160:56`
`x=360`
`x+5270=1582xx3`
`x+5270=4746`
`x=4746-5270`
`x=-524`
(lớp `5` đã học số âm =)?)
`x-725=9828:52`
`x-725=189`
`x=189+725`
`x=914`
20160:x=56
x=20160:56
x=360
-----------
x+5270=1582.3
x+5270=4746
x=4746-5270
x=-524
-----------------
x-735=9828:52
x-735=189
x=189+735
x=924