SOLVING EQUATIONS CONTAINING ABSOLUTE VALUE(S)
SOLVING EQUATIONS CONTAINING ABSOLUTE VALUE(S)
Note:
if and only if 
if and only if
a + b = 3 or a + b = - 3
if any only if
a + b = + (x + y)
or a + b = - (x + y)
Solve for x in the following equation.
Problem 3.3b:
Answer: 
and x=-1
Solutions:
Either 
or 
Step 1:
Step 2:
Step 3:
Since the left side of the original equation equals the right side of the
original equation when 0.333333 is substituted for, then x = 0.333333 is a
valid solution.
If you would like to go back to the problem page, click on problem.
If you would like to go back to the equation table of contents, click on
contents.
The answers are 
and x = -1.
Check the solution x=-1 by substituting -1 in the original equation for
x. If the left side of the equation equals the right side of the equation
after the substitution, you have found the correct answer.
Since the left side of the original equation equals the right side of the
original equation when -1 is substituted for, then x=-1 is a valid
solution.
You can also check your answer by graphing 
(the left side of the original equation minus the
right side of the original equation). You will note that the two
x-intercepts on the graph are located at 
and
-1. This verifies the solutions.
If you would like to review the answer and solution to problem 3.3c, click
on solution.
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