rani

2w+3squareroot of w=14

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rani

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\[2w+3\sqrt{w}=14\]

rani

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solve by substitution

liza2

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w= 4
Don't know how to solve it by substitution

rani

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i got 4 also

rani

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what did you use?

rani

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i got w=4 and w = -7/2

liza2

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Just looked at the problem & guessed, then checked my math.

rani

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lol wtf, good guess

liza2

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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.