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A number line can be represented as shown below.

By using this number line, we can compare two numbers for which is bigger number and which is smaller number. Here we can use four set of symbols like Greater than (>), less than (<), greater than or equal to (>=) and less than or equal to (<=).

Solution:

Given equation is x greater than -3.It means that the values of x will be greater than -3.

So the values of x increase on right hand side because the values on right hand side are bigger.

The values of x are increasing like -2,-1, 0, 1, 2……so on.

Solution:

Given equation is x less than 4.It means that the values of x will be less than 4.

So the values of x decrease on the left hand side because the values on left hand side are smaller.