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If you double a number and then add 12 you get four fifths of the original number. What is the original number?
Updated: 4/28/2022
Wiki User
∙ 12y agoBest Answer
Let x equal the number. Then:
2x + 12 = 4/5x
2x - 4/5x = -12
6/5x = -12
x = -12 * 5/6
x = -10
Wiki User
∙ 12y agoThis answer is:
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Four fifths IS anumber.
What number is four fifths of 15?
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Add 1/5 to it.
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The answer is actually 3 fifths. This is because if you double the bottom to equal 10 you have to double the top leaving it 6 tenths which is grater than four tenths.
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Is four fifths a rational number?
It is a rational number.
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Four fifths of 10 is 8.
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