Problem Solving (PS) | Re: An optometrist charges $150 per pair for soft contact lenses and $85

friends, any tips for the math part here? I find it takes time and then i start stressing.
I also simplified and it still takes time; in such questions where the maths takes time, how do i make the decision between let me just do the math and "there must be an easier way"?­

Statistics : Posted by sherifY • on 25 Dec 2010, 08:00 • Replies 11 • Views 18203

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