math
posted by Anonymous on .
can some one solve this
Ex 1:
2x+7>22
2x+77>227
2x>15
2x/(2)<15/(2) Switching the order of the inequality here is essential to keep the solutions true for the inequality since I divided by a negative #.
x<7.5
Check:
Try 8. It should work since it is less than 7.5
2x+7>22
2(8)+7>22
16+7>22
23>22
It does make the inequality true so it looks as if I have solved correctly. So my solution is {xx<7.5} which is just a mathy notation way of saying "the set of all values for x such that x is less than 7.5.” This notation amplifies that this is a whole set of values that x can equal and not just one value.

You forgot to reverse the carat, when dividing by 2.
x > 7.5