1. 89:x-51,5:x=62,5
( 89-51,5 ):x=62,5
37,5:x=62,5
x=62,5.37,5
x=1343,75
2.34,56 x 999 + 3,456 x 10
=34,56x999+34,56x1
=34,56x(999+1)
=34,56x1000
=34560
1.
89:x-51.5:x=62.5
89.1/x-51,5.1/x=62,5
1/x(89-51,5)=62,5
1/x.37,5=62,5
1/x=5/3
x=3/5
2 tương tự nhân vô