What is the answer to:
a+4 ≥ 2a
It asks you to isolate the variable.
My answer booklet says the correct answer is
4 ≥ a.
I do not know how they reached this conclusion. My thought process told me to divide a+4 by a and then divide 2a by a. That left me with 4≥2.
What am I doing wrong? How do i get the correct answer of
4 ≥ a. My answer book does not explain it.
Your help is greatly appreciated!!
I hope that the "gre" in "gredude" doesn't stand for "graduate record exam"! You are misundertanding things that are covered in a class for 12 to 13 year old students- and that follow directly from more basic arithmetic. No, "2a- a" is NOT 2. Subtracting a does not mean "erase the a". If you have two elephants and "take away" one elephant, you have left one elephant, not the number "2". If a= 5, 2a= 10 and 2a- a is 10- 5= 5= a.