The price of old computer is: $900
and new computer's cost is: $1900
Step-by-step explanation:
Let x be the price of old computer model
Then the price of new computer will be:
sum of costs = 2800
so,
Dividing both sides by 3
2x+100 = 2(900)+100 = 1800+100 = $1900
The price of old computer is: $900
and new computer's cost is: $1900
Keywords: Linear equation, variables
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