【例2】若关于$x的不等式组\left\{\begin{array}{l} 5-3x≥0,\\ x-m≥0\end{array} \right. $有实数解,则实数$m$的取值范围是().
A.$m≤\frac {5}{3}$
B.$m＜\frac {5}{3}$
C.$m＞\frac {5}{3}$
D.$m≥\frac {5}{3}$

A

【例3】关于$x的不等式组\left\{\begin{array}{l} -x+a＜2,\\ \frac {3x-1}{2}≤x+1\end{array} \right. $恰有3个整数解,则$a$的取值范围是.

$2\leq a \lt 3$