## rani Group Title 2w+3squareroot of w=14 2 years ago 2 years ago

1. rani

$2w+3\sqrt{w}=14$

2. rani

solve by substitution

3. liza2

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

4. rani

i got 4 also

5. rani

what did you use?

6. rani

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

7. liza2

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

8. rani

lol wtf, good guess

9. liza2

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.