A one-third of an unknown number is equal to five times as great as the difference between the same unknown number and the number 28.
Find the unknown number.

Correct answer:

x =  30

Step-by-step explanation:

3x=5(x28)  x/3=5(x28)  x/3=5 (x28)  14x=420  x=14420=30  x=30

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