If x is zero, is the following true?
2x  9 < 4x + 1 < 8x + 1
In the back of your books write down at least 10 values of x which satisfy this inequality statement.
"<" means "is less than"
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When x is zero the statement is not true.
Here are ten values of x which make the statement true:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
there are of course many other values which make the statement true.
An inequality like this can be solved by splitting it into two parts:
2x  9 < 4x + 1 10 < 2x x > 5 
4x + 1 < 8x + 1 0 < 4x x > 0 
So the complete answer is x > 0
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