How do you solve #(x+68)/(x+8)>=5#?
2 Answers
Explanation:
Given:
#(x+68)/(x+8) >= 5#
Subtract
#0 >= 5-(x+68)/(x+8) = (5(x+8)-(x+68))/(x+8) = (4x-28)/(x+8) = (4(x-7))/(x+8)#
Note that the right hand side is a function which is continuous and non-zero except at
When
When
When
When
So the solution set is:
#x in (-8, 7]#
The solution is
Explanation:
We cannot do crossing over.
So, we simplify the inequality
Let
We can build the sign chart
Therefore,