Linear inequations

To solve a linear inequation, we have to obtain equivalent inequations until we work out the unknown.

Example:
2x + 3 ≤ 4x + 7         2x + 3 – 3 ≤ 4x + 7 – 3
2x – 4x ≤ 4x + 4 – 4x       - 2x ≤ 4       x ≥ -2
x€[-2,∞)
NOTE: don’t forget to represent the interval.