The cost of a plane ticket was increased by $15. The new price is $84. What was the price before the increase?

Answer 1

The price before the increase is $69.

Use the equation: x + 15 = 84 x = the price before the increase 15 = how much the ticket has increased 84 = the resulting price of the increase

Simply subtract 15 from both sides of the equation. The result is x = 69.

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Answer 2

Genesis Allen

Let ( x ) represent the original price of the plane ticket.

Given that the cost increased by $15, the new price is $ x + 15 $, which is$ 84.

So, ( x + 15 = 84 ).

To find the original price (( x )), subtract 15 from both sides:

( x = 84 - 15 )

( x = 69 )

Therefore, the price before the increase was $69.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.