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gulaghasi [49]
3 years ago
11

An eight-month used stereo system was sold for $255.75. This was one third (1/3) the amount of what this system originally cost.

What was the original cost of this set?
Mathematics
1 answer:
Alex3 years ago
4 0
From the givens, we know that 1/3 of the original cost is $255.75

Assume that the original price of the stereo is y, therefore:
(1/3) y = 255.75
y = 3 x 255.75

The original price of the stereo is $767.25
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Solve for p<br> 3+|1+p|=12
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Subtract 3 from both sides

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break down the problem into these two equations

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solve the first equation 1 + p = 9 and that would be 8 since 1 + 8 = 9 is true.

solve the second equation -(1 + p) = 9 and just simplify brackets and add 1 to both sides then add 9 + 1 and lastly multiply both sides by -1 and p = -10.

Gather both solutions

Answers: p = -10, 8


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