Answer:
Explanation:
x in (-oo:+oo)
2 < (1/2)*x-3 // - (1/2)*x-3
2-((1/2)*x)+3 < 0
(-1/2)*x+2+3 < 0
5-1/2*x < 0 // - 5
-1/2*x < -5 // : -1/2
x > -5/(-1/2)
x > 10
x in (10:+oo)
(10:+oo)
x > 9
21 < 2x + 3
Subtract 3 from both side
21 —3 < 2x + 3 —3
18 < 2x
Divide both side by the coefficient of x i.e 2
18/2 < x
9 < x
Since 9 is less than x, it therefore means that x is grater that 9.
