clark wants to figure how many pens to order for the office there are 48 workers and he needs to order one pen for each worker he knows that for every three peole who prefer red there are nine who prefer blue how many blue pens should he order
First, notice that Clark needs to order 48 pens in total, and that there will be three times the number of blue pens as red pens. This can be written as follows: 1. Total Number of Pens = 48 2. Number of Blue Pens = 3 * (Number of Red Pens) Adding together the numbers of red and blue pens will total 48 pens: 3. (Number of Blue Pens) + (Number of Red Pens) = 48 Pens Now, substitute the second equation into the third, like so: 4. (3 * Number of Red Pens) + (Number of Red Pens) = 48 Pens This equals: 5. 4 * Number of Red Pens = 48 Pens Now divide each side by four: 6. Number of Red Pens = 12 Pens Plug this into the second equation to get your answer: 2. Number of Blue Pens = 3 * (Number of Red Pens)
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