Question

Arthur and Sam shared some postcards. If Arthur gave 20 postcards to Sam,
they would have the same number of postcards. How many postcards would
Arthur have if Sam gave him 10 postcards and the ratio of the number of
postcards he had to the number of postcards Sam had became 2 : 1?
Plssss help

Answer 1

If Arthur can give Sam 20 and they will have the same amount then Arthur has 20 more then Sam. So let's say Sam has 40 Arthur would have 60. If Sam gave Arthur 10 then Arthur would have 70 and Sam would have 30.