Question 696362: Please answer my question: If 6 kilos of oranges and 5 kilos of apples cost 419 while 5 kilos of oranges and 7 kilos of apples cost 488, what is the cost of each per kilo?
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! If 6 kilos of oranges and 5 kilos of apples cost 419 while 5 kilos of oranges
and 7 kilos of apples cost 488, what is the cost of each per kilo?
:
Let x = cost of oranges per kilo
Let y = cost of apples
:
write an equation for each transaction
6x + 5y = 419
5x + 7y = 488
:
Use elimination here, mult the 1st eq by 7 and the 2nd eq by 5
42x + 35y = 2933
25x + 35y = 2440
-------------------subtraction eliminates y, find x
17x = 493
x = 493/17
x = 29 is the cost of the oranges
;
You can find the cost of the apples, substitute 29 for x in one of the equations and find y.
Check your solutions in the other equation.
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