Nifal earned 9$ for washing two cars .He recived $1 more for the second car. How much was he paid for washing each car?Which two numbers have a sum of 9$?

Nifal received $ 4 for washing the first car.

Nifal received $ 5 for washing the second car.

4 and 5 have a sum of 9.

Step-by-step explanation:

The problem can be rewritten as follows: Find the sum of two consecutive entire numbers equal to 9. That is:

Then, by eliminating y:

Now, let is clear :

Nifal received $ 4 for washing the first car.

The earning for the second car is: ()

Nifal received $ 5 for washing the second car.

4 and 5 have a sum of 9.

i only know the sequence of arithmetic it adds the first is 5+4 then it goes up as it adds to then it is 9+5 then 14+6 then to 20+7 and so on. 5,9,14,20,27,35.

step-by-step explanation: