Symbol ≥≥

Symbol ≤≤

• At least

• Not less than

• Minimum

• At most

• Not more than

• Maximum

Example

Construct the linear inequality:

The price, RMxRMx, of a double-storey terrace house is RM450000RM450000 and above.

The linear inequality is,

x≥450000x≥450000.

Example

Calculate: 16−5x≤−416−5x≤−4

16−5x≤−416−5x−16≤−4−16−5x≤−20−5x−5≥−20−5x≥4.16−5x16−5x−16−5x−5−5x​x​≤−4≤−4−16≤−20≥−5−20​≥4.​

Example

Solve:

8x+5≥5x−138x+5≥5x−13 and

3x−4>9x+203x−4>9x+20.

8x+5≥5x−138x−5x≥−13−53x≥−18x≥−6.8x+58x−5x3xx​≥5x−13≥−13−5≥−18≥−6.​

3x−4>9x+203x−9x>20+4−6x>24x<−4.3x−43x−9x−6xx​>9x+20>20+4>24<−4.​

Thus, the solution is

−6≤x<−4−6≤x<−4.