# Math Help - Interval

1. ## Interval

The problem says:

Solve the equation, then choose the interval that contains the solution.

59-4a=-187

a. between 30 and 35
b. beween 60 and 65
c. between -105 and -110
d. between -10 and -15

Now, I work the problem out like they show in the example and I get 32, which is a, but the book says that it is b.

Im so confused, what am I doing wrong?

2. Originally Posted by ChristieZissler
The problem says:

Solve the equation, then choose the interval that contains the solution.

59-4a=-187

a. between 30 and 35
b. beween 60 and 65
c. between -105 and -110
d. between -10 and -15

Now, I work the problem out like they show in the example and I get 32, which is a, but the book says that it is b.

Im so confused, what am I doing wrong?
It's b. it is exactly 61.5.

$59-4a=-187$ subtract 59 from both sides
$-4a=-246$ divide by -4 on both sides (..a negative divided by a negative is a positive...)
$a=61.5$

that is the WORST layout ever. but do you see what you did wrong, or do you need further explanation? 'cause I'd be happy to explain better if you want me to!