Asked by Anonymous
                Last week, Fred had a total of 334 yellow and red pens. Two weeks later, he sold 2/3 of all the yellow pens and 82 red pens. Now he has the same number of yellow and red pens. How many pens does he have in the end?
            
            
        Answers
                    Answered by
            Bosnian
            
    y = yellow pens
r = red pens
Last week, Fred had a total of 334 yellow and red pens means:
y + r = 334
When he sold 2 / 3 of all the yellow pens rest of yellow pens is y / 3
When he sold 82 of all the red pens rest of the red pens is r - 82
Now he has the same number of yellow and red pens means:
y / 3 = r - 82
Now you must solve system of two equations:
y + r = 334
y / 3 = r - 82
__________
Try to solve that.
The solutions is:
y = 189 , r = 145
In the end he have y / 3 + r - 82 = 189 / 3 + 145 - 82 = 123 pens
    
r = red pens
Last week, Fred had a total of 334 yellow and red pens means:
y + r = 334
When he sold 2 / 3 of all the yellow pens rest of yellow pens is y / 3
When he sold 82 of all the red pens rest of the red pens is r - 82
Now he has the same number of yellow and red pens means:
y / 3 = r - 82
Now you must solve system of two equations:
y + r = 334
y / 3 = r - 82
__________
Try to solve that.
The solutions is:
y = 189 , r = 145
In the end he have y / 3 + r - 82 = 189 / 3 + 145 - 82 = 123 pens
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