SOLUTION: A calculator and a battery together sell for $21.00. The price of the calculator is $20 more than the price of the battery. Find the price of the calculator and the price of the

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Question 145543: A calculator and a battery together sell for $21.00. The price of the calculator is $20 more than the price of the battery. Find the price of the calculator and the price of the battery.
Answer by 24HoursTutor.com(40) (Show Source):
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Let the value of battery be = x
Thus, the price of calculator is = 20 + x
Now together they = 21
Which means :
x + 20 + x = 21
20 + 2x = 21
2x = 21-20
2x=1
x=1/2
x=0.5
Ans. : The price of the battery is x which is 0.50$ and the calculator which costs 20$ more than the battery is worth $20.50.
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