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mezya [45]
3 years ago
7

Ofelia has a certain amount of money. If she spends $12 , then she has 1/5 of the original amount left. How much money did Ofeli

a have originally?
Mathematics
1 answer:
marusya05 [52]3 years ago
6 0
x-original\ amount\\\\x-12=\frac{1}{5}x\\\frac{5}{5}x-\frac{1}{5}x=12\\\frac{4}{5}x=12\ \ \ \ \ |\cdot\frac{5}{4}\\x=15\\\\She\ had\ \$15\ originally
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\frac{1}{4} *80
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4 years ago
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So what is given is:

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Another approach is to replace the multiplication with a simpler one in your head. So in stead of reading "length = 1.9 * width, what is width?", you read "6 = 2*3, what is 3?". You'll immediately realize 3 = 6/2, and that shows you how to change the real equation, ie., width = length/1.9.




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4 years ago
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3 years ago
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Alex Ar [27]

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