When x is a positive integer, the value of the algebraic formula 4x-2 / 5 is not greater than that of the algebraic formula 1-3x / 4
The opposite of (1-3x) / 4 is - (1-3x) / 4
So (4x-2) / 5 ≤ - (1-3x) / 4
Take 20 on both sides
4(4X-2)≤-5(1-3X)
16X-8≤-5+15X
X≤3
When x is equal to what number, the value of the algebraic expression x-3 / 2 is not less than the value of X + 6 / 5
(x-3)/2-(x+6)/5>=0
(5x-15-2x-12)/10>=0
3x-27>=0
x>=9
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