0.3 ( 0.3 x + 0.8 ) < − 0.3 / : 0.3 0.3 ( 0.3 x + 0.8 ) : 0.3 < − 0.3 : 0.3 0.3 x + 0.8 < − 1 0.3 x < − 1 − 0.8 0.3 x < − 1.8 / : 0.3 x < − 0.3 1.8 x < − 3 18 x < − 6 ⇔ x ∈ ( − ∞ ; − 6 )
The solution to the inequality 0.3 ( 0.3 x + 0.8 ) < − 0.3 is x < − 6 . This means any value of x that is less than -6 will satisfy the inequality. In interval notation, the solution is expressed as ( − ∞ , − 6 ) .
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