1.

Solve as directed: 5x le 20 in positive integers, in integers.

Answer»

Solution :`5X LE 20`
`rArr (5x)/5 le (20)/5 rArr X le 4`
Ifis apositive INTEGER, then the solution set is {1,2,3,4}
If x is a integer,then the solution set is :
S = { x:x in Z and x `le` 4]


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