Question 1138043: word problems
If you double a number, and then add 16, you will get 2/5 of the original number. What is the original number?
well I get: 2x + 16 = 2/5x ??
and I don't know how to solve it. Im stumped. please help me? Thank you.
Found 3 solutions by VFBundy, josgarithmetic, MathTherapy:
Answer by VFBundy(438)   (Show Source):
You can put this solution on YOUR website! 2x + 16 = (2/5)x
(5/2)(2x + 16) = x
5x + 40 = x
4x = -40
x = -10
Double-check:
Start with -10. Double it to get -20. Add 16 to get -4. -4 is 2/5 of the original number, -10.
Answer by josgarithmetic(39617)  (Show Source):
You can put this solution on YOUR website! x, the number
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double a number, and then add 16, you will get 2/5 of the original number.
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SOLVE FOR x.
First step can be
and you can choose the next steps.
Answer by MathTherapy(10552)  (Show Source):
You can put this solution on YOUR website!
word problems
If you double a number, and then add 16, you will get 2/5 of the original number. What is the original number?
well I get: 2x + 16 = 2/5x ??
and I don't know how to solve it. Im stumped. please help me? Thank you.
10x + 80 = 2x ------- Multiplying by LCD, 5
80 = 2x - 10x
80 = - 8x
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