Question

3(x - 5) < -21 on a number line

Answer 1

see below

Explanation:

You can solve for x as follows:

Divide by 3:

x -5 < -7

Add 5

x < -2

This plots on a number line with an open circle at -2, and shading to the left.

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The circle is open because the value -2 is not in the solution set. Shading is to the left because all values less than -2 are in the solution set.