Inequality typically refers to situations where two people who are similar except for one particular characteristic are treated differently. For instance, deciding between promoting workers of equal competence based on their race or gender would be an example of inequality.
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There appears to be no inequality in the question: only some disjoint expressions. Expressions cannot be solved.
The answer depends on the nature of the inequality: whether it is linear, quadratic or has some other functional form.
It mean that in some countries are underdevloped
If the absolute value inequality is of the form where the absolute value of the difference between a variable (X) and some constant (a) is compared to another constant (b) eg |X - a| compared with b, then if the comparison is < or ≤, the compound inequality is a double inequality of the form c < X < d (or ≤), and if the comparison is > or ≥, the compound inequality is a disjoint inequality of the form X < c or X > d (or including the equals). In both cases, c = b - a, d = b + a (>c)
algebraic inequality, is an inequality that contains at least one variable.