004 Sample Final A, Problem 3

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Solve. Provide your solution in interval notation.     

1) What is the solution to ?
2) How do you write in interval notation?
1) The solution is or .


Step 1:
The inequality above means or .
Step 2:
Subtracting 7 from both sides of the inequalities, we get or .
Step 3:
Dividing both sides of the inequalities by 4, we have or .
Step 4:
Using interval notation, the solution is .
Final Answer:

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