SOLUTION: when you solve linear equations do you have to add {} to your final answer? for example: 3x+7>28 ..-7.-7 3x>21 /3./3 x>7 --this would be the answer, corrert, but the FINAL

Algebra ->  Inequalities -> SOLUTION: when you solve linear equations do you have to add {} to your final answer? for example: 3x+7>28 ..-7.-7 3x>21 /3./3 x>7 --this would be the answer, corrert, but the FINAL       Log On


   

Question 208106: when you solve linear equations do you have to add {} to your final answer?
for example:
3x+7>28
..-7.-7
3x>21
/3./3
x>7 --this would be the answer, corrert, but the FINAL ANSWER would be
{x|x>7}
is this correct or is this only added to absolute value inequalties?




the problem was from the book :algebra 2 by mcdougal littell
it was on page 941 question number 41
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Both x>7 and {x | x>7} are correct as they basically mean the same thing. The second form is simply the first form, but it is using set-builder notation. If the book said "state the solution in set-builder notation" (or something like that), then you would use the second form.