A pair of running shoes cost 5 more than a pair of regular tennis shoes the total cost for both 115 find the price of the regular tennis shoes?

Try this- the tennis shoes cost X. The running shoes cost X+5. So X + X+5= 115. So that is 2x+5=115. Now subtract 5 from each side of the equal mark, and you have 2x=110. Divide the 110 by 2, and you will have X- the cost of the tennis shoes. (Come on, I am not going to do ALL your homework for you!)