Algebra
posted by Kim .
I am having trouble with 4less than or equal to 3x13 less than or equal to 26
4 < 3x13 < 26
Add 13 to all three parts of the inequality.
9 < 3x < 39
Divide all three parts by 3.
3 < x < 13
The < signs should all be "less than or equal, but I can't type that symbol with this computer
Take it apart into 2 statements
a) 4<=3x13
3x<=9
x<3
AND
b)3x13<=26
3x<=39
x>=13
now combine it into 13<=x<=3
or you could do it the way it sits
4<=3x13<=26
add 13
9<=3x<=39
divide by 3, remember to reverse the inequality sign
9>=x>=13
which is the same result as in my first solution.
drwls, you missed the sign in front of the 3x.
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