joeseph, brian, and kyle spent 1189$ to buy their dad a computer. Brian paid 148$ more than Joseph. Joeseph paid 399$ less than kyle. how much did kyle pay?

Question

they all used their savings to pay for the computer.

Answer 1

k represents the amount Kyle paid

k - 399 represents the amount Joseph paid

(k - 399) + 148 represents the amount Brian paid

 

k + (k - 399) + (k - 399) + 148 = 1189

 

Can you solve for k and answer the question?

Answer 2

Let how much each paid be assigned as below:

Joseph= J, Brian= B and Kyle= K.

 

You can write 3 equations to represent the three unknowns:

 

1. J + B +K = $1189
2. J + $148 = B
3. K - $399 = J

 

Substitute equation (2) into equation (1).

 

      J + (J + $148) + K = $1189

 

Now substitute equation (3).

 

      (K - $399) + ((K - $399) + $148) + K = $1189

 

        3K - $399 - $399 + $148 = $1189

 

        3K - $650 = $1189

 

        3K = $1839

 

           K = $613 is how much Kyle paid.