SOLUTION: When 18 is subtracted from four times a certain number, the result is 5/2 the original number. What is the number?

Question 550551: When 18 is subtracted from four times a certain number, the result is 5/2 the original number. What is the number?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
"When 18 is subtracted from four times a certain number, the result is 5/2 the original number. " means that we have the equation . Let's solve this equation for n.

Start with the given equation.

Multiply both sides by the LCD to clear any fractions.

Distribute and multiply.

Add to both sides.

Subtract from both sides.

Combine like terms on the left side.

Divide both sides by to isolate .

Reduce.

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Answer:

So the solution is

So the unknown number is 12
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