Open sentences algebra 1 how to do the ploblem ?

mirelis-sandelis

Find the solution of each equation if the replacement sets are X =1/4 , 1/2 , 1 , 2 ,3

X+1/2=5/2

kebert-xela

answer is 2, basically you plug in the sets for x till u find the right one, it's faster for me to just solve for x though