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2w+3squareroot of w=14

Mathematics
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\[2w+3\sqrt{w}=14\]
solve by substitution
w= 4 Don't know how to solve it by substitution

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Other answers:

i got 4 also
what did you use?
i got w=4 and w = -7/2
Just looked at the problem & guessed, then checked my math.
lol wtf, good guess
well, if you look at it, you know odds are w has to be a number that has an integer square root. And it has to be pretty low. So, 4 was the first number that came to mind, because 9 is the next square, and it's already too high.

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