we have that If (5x-4+13x=5) --------------> then x=1/2 Step 1 let's substitute the value of x = (1/2) in the expression [5x-4+13x] and verify its result 5*(1/2)-4+13*(1/2) (5/2)-4+(13/2) (5-4*2+13)/2----------> (5-8+13)/2=10/2=5 then 5=5-----------> the value of x = (1/2) satisfies equality
