Answer: Charles bought a used car and later sold it for a 20% profit. If he sold it for $4680, how much did Charles pay for the car?
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Let the price he paid equal "x".
EQUATION:
x + 0.20x = 4680
1.2x = 4680
x = $3900 (price he paid for the car.
24? I think if it means he will be thirteen years off his mothers age

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To solve this all it takes is two simple steps
Simplify

1/2x =22
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Multiply both sides by 2
2 ·

= 2 · 22
x = 44
In fraction 1/2 in decimal 2.5