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I am not sure if this is exact.. but I will try my best.
To solve for linear inequalities, it is the same as linear equations, but the sign is only different like >,<,≥,≤.

For example

Subtract 4 to both sides
Divide both sides by 2

Therefore the value of x is less than 2.

If the number x is negative, then the sign will change into its opposiote
like from > to <, from ≥ to ≤


Subtract 5 to both sides
Divide both sides by -2

That means the value of x is greater than 4.

Hope this helps =)
1 5 1