so when you divide x by 19 you get 20 or x/20=19
when you divide x by 21 you get 20 or x/21=20
when you divide x by 35 you get 34 or x/35=34
so x/20=19
x/21=20
x/35=34
solve
x/20=19
mutiply both sides by 20
x times 20/20=19 times 20
x=380
x/21=20
multiply both sides by 21
x times 21/21=20 times 21
x=420
these sentences do not work together statement
there is no solution