How to solve for proportions?

Question
Jordan can solve 12 math problems in 3 minutes. How long will it take him to solve 45 problems?




Solution
Write the word problem into an equation.
Let x = how fast Jordan can solve 45 problmes
12:3 = 45: x
Therefore, 12x = 135
x = 11.25

Jordan can solve 45 problems in 11 minutes and 15 seconds!

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