# Math Help - Problems with signs

1. ## Problems with signs

105= 99 (100+y) + 1

Y= ?

Thw solution says 6.06, but i run into difficulty deriving this, Can anyone help

2. ## The solution is wrong

The solution is wrong.

105= 99 (100+y) + 1
104 = 99(100+y)
$\frac {104}{99}$ = 100+y
y = $\frac {104-9900}{99}$
y = $\frac {-9796}{99}$

3. the sol says;

(105-99)/99=.0606

so he moves 99 across to deduct from 105, but i cant see whys hed dividing by 99......

4. Originally Posted by flynne8
the sol says;

(105-99)/99=.0606

so he moves 99 across to deduct from 105, but i cant see whys hed dividing by 99......
Where does this come from? (105-99)/99=.0606

You can't just "move it across".

5. The Q is; 105 = 99 * (100+y) + 1

and gives the sol;

y=(105-99)/99=6.06%

?????

6. Originally Posted by flynne8
The Q is; 105 = 99 * (100+y) + 1

and gives the sol;

y=(105-99)/99=6.06%

?????
The solution is wrong.. subtract one from both sides and you have: $104=99(100+y)$.

Now, divide both sides by 99..

$\frac{104}{99}=100+y$

Subtract 100 from both sides...

$y = \frac{104}{99}-100$