Question 399947
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Hi,  
{{{(x/2) + (x/5) = (5/4)}}}  |multiplying each term by 20
{{{(20x/2) + (20x/5) = 20(5/4)}}}
   10x + 4x = 25
       14x = 25
         x = 25/14

CHECKING our Answer***
 {{{(25/14)/2 + (25/14)/5}}} =  25/28 + 5/14 = 25/28 + 10/28 = 35/28 = 5/4