Question 190368
x+4/5=x+5/7

If we subtract x from both sides, we get 4/5=5/7, an impossibility.   
Also -1.5+.8=-1.5+0.714 is an impossibility, so (a) is incorrect.  And 
1.5+.8=1.5+0.714 is also am impossibility.  The answer is (c) no real solution.