martwatch and one

Question

Maria and Sam bought the items shown below:

Maria's Bill: 1 iPad, 3 Smartwatches and 4 Cellphones. Total $3028.

Sam's Bill: 3 iPad, 5 Smartwatches and 6Cellphones. Total $5032.

Calculate the TOTAL cost of one iPad, one smartwatch and one cellphone?

Answer 1

3P +5S + 6C = 5032 subtract the other equation

P +3S + 4C = 3028 to get

2P + 2S + 2C = 5032-3028 = 2004

divide by 2

P + S + C = 2004/2 = 1002