Answer:
-11/2
Explanation:
According to the information given, you can write the following:
3(-5/3)-x=1/2, where x is the number that should be subtracted from thrice the rational number -5/3 to get 1/2.
Then, you can solve for x:
-15/3-x=1/2
-5-x=1/2
x=-5-1/2
x=-11/2
According to this, the answer is that -11/2 is what should be subtracted from thrice the rational number -5/3 to get 1/2.