X would equal 0. -7=2x-7 You would add 7 to both sides and both of the seven would cross out leaving you with 0=2x You’d divided both sides by 0 and x would be 0.
First, Rico walked for 3/10 of a mile which is 30/100 of a mile. Hen, Rico walked for 24/100 of a mile. Then you add 24/100 and 30/100. 24+30/100 which is 54/100. Answer=54/100 of a mile