A number decreased by 30 is the same as 14 decreased by 3 times the number. Find the number. Explain!

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A number decreased by 30 is the same as 14 decreased by 3 times the number. Find the number. Explain!
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Let the required number be x.

Then according to the given problem,

x-30=3x-14
x-3x=-14+30
-2x=16
x=16/-2
x=-8

Therefore the required number is -8.
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The answer is 11
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