If x is zero, is the following true?
9x  20 < 4x < x + 27
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 true.
Here are ten values of x which make the statement true:
3, 2, 1, 0, 1, 2, 3, 4, 5, 6,
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:
9x  20 < 4x 5x < 20 x < 4 
4x < x + 27 3x < 27 x < 9 
So the complete answer is x < 4
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