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b. x = { 1,2,3,4,5 }
c. 2x < 3(x + 1)/4 + 1/3
2x < 9(x + 1)/12 + 4/12
2x < {9(x+1) + 4}/12
24x < 9(x + 1) + 4
24x < 9x + 9 + 4
24x < 9x + 13
24x - 9x < 13
15x < 13
x < 13/15
x = { 0,-1,-2,-3,-4,...... }