In a bookstore,the prices of a ball-pen and a atapler are$a and$b respectively.Itis given that three ball-pens are chapter than two stapler by $4.
Express y in term of x
if two dozen ball-pens cost $48 more than half dozen staplers,find x.
how to calculate??
- 1 十年 前最佳解答
although I don't why there is no "x" &"y" in the question, I let $a=x, $b=y.