Solve as directed : 7(x-3) `le` 4 (x +6 ), for non-negative integral values.

Explanation

7(x-3) `le` 4 (x +6 )
`rArr 7x - 21 le 4x + 24`
`rArr 7x - 4x le 24 + 21`
`3x le 45`
`x le 9`
If x is a non negative integer the solution setis
S = {0,1,2,3,4,5,5,6,7,8,9}