In a newspaper, it was reported that yearly robberies in Springfield were up 26% to 315 in 2014 from 2013. How many robberies were there in Springfield in 2013?

Step-by-step explanation:

Here let us assume that the number of robberies in 2013 = m

Given the number of robberies in 2014 = 315

As we can see the robberies has risen by 26% .\

⇒  26%   + 100 % of Robberies in 2013  = 315

⇒ 126% of m   = 315

or, m = 250

Hence, the number of robberies in Springfield in 2013 is 250.

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9