If we know the linear function y &; = X-5 and Y &; = 2x + 1, and Y &; ≥ Y &;, then the value range of X is

If we know the linear function y &; = X-5 and Y &; = 2x + 1, and Y &; ≥ Y &;, then the value range of X is

Because y &; ≥ Y &; so y &; - Y &; ≥ 0, that is x-5-2x-1 ≥ 0
x-2x≥1+5
-x≥6
x