Inequalities and Linear Programming
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Pre-Calculus › Inequalities and Linear Programming
Solve for 
Explanation
In order to solve this equation, we must first isolate the absolute value. In this case, we do it by dividing both sides by  which leaves us with:
When we work with absolute value equations, we're actually solving two equations. So, our next step is to set up these two equations:
 and 
In both cases we solve for  by adding 
 to both sides, leaving us with
 and 
This can be rewritten as 
Solve for 
Explanation
In order to solve this equation, we must first isolate the absolute value. In this case, we do it by dividing both sides by  which leaves us with:
When we work with absolute value equations, we're actually solving two equations. So, our next step is to set up these two equations:
 and 
In both cases we solve for  by adding 
 to both sides, leaving us with
 and 
This can be rewritten as 
Solve for 
Explanation
In order to solve this equation, we must first isolate the absolute value. In this case, we do it by dividing both sides by  which leaves us with:
When we work with absolute value equations, we're actually solving two equations. So, our next step is to set up these two equations:
 and 
In both cases we solve for  by adding 
 to both sides, leaving us with
 and 
This can be rewritten as 
Solve for 
Explanation
When we work with absolute value equations, we're actually solving two equations:
 and 
Adding  to both sides leaves us with:
 and 
Dividing by  in order to solve for 
 allows us to reach our solution:
 and 
Which can be rewritten as:
Solve for 
Explanation
When we work with absolute value equations, we're actually solving two equations:
 and 
Adding  to both sides leaves us with:
 and 
Dividing by  in order to solve for 
 allows us to reach our solution:
 and 
Which can be rewritten as:
Solve for 
Explanation
When we work with absolute value equations, we're actually solving two equations:
 and 
Adding  to both sides leaves us with:
 and 
Dividing by  in order to solve for 
 allows us to reach our solution:
 and 
Which can be rewritten as:
Solve the following inequality:
Explanation
First we need to get the expression with the absolute value sign by itself on one side of the inequality. We can do this by subtracting two from both sides then dividing everything by three.
Since absolute value signs make both negative and positive values positive we need to set up a double inequality.
Now to solve for  subtract four from each side.
Solve the following inequality:
Explanation
First we need to get the expression with the absolute value sign by itself on one side of the inequality. We can do this by subtracting two from both sides then dividing everything by three.
Since absolute value signs make both negative and positive values positive we need to set up a double inequality.
Now to solve for  subtract four from each side.
Solve the following inequality:
Explanation
First we need to get the expression with the absolute value sign by itself on one side of the inequality. We can do this by subtracting two from both sides then dividing everything by three.
Since absolute value signs make both negative and positive values positive we need to set up a double inequality.
Now to solve for  subtract four from each side.
Solve the following system of linear equations:
Explanation
In order to solve a system of linear equations, we must start by solving one of the equations for a single variable:
We can now substitute this value for y into the other equation and solve for x:
Our last step is to plug this value of x into either equation to find y: