÷ = (元)
÷ = (套)…… (元)
答:每支圆珠笔3元;可以买5套教学用具,还剩12元.
—He wants to visit my school.
(Ⅰ)解不等式①,得____;
(Ⅱ)解不等式②,得____;
(Ⅲ)把不等式①和②的解集在数轴上表示出来____:
(Ⅳ)原不等式组的解集为____.