Thread: Problems with signs

105= 99 (100+y) + 1

Y= ?


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

The solution is wrong.

105= 99 (100+y) + 1

104 = 99(100+y)
= 100+y
y =
y =

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......

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".

Badgerigar's solution seems correct.

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

and gives the sol;

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

?????

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: .

Now, divide both sides by 99..



Subtract 100 from both sides...