4/5
just take 16/20 and divde both be 4




Use the identity:
and solve for
. You get: 
Do the substitution on the left side to get:

The blue point on the number line is 5 units away from zero, which is: 5.
<h3>What is a Number Line?</h3>
A number line is an arrangement of numbers from point zero, on both sides of the starting point, which is zero.
In the number line given, the blue point is 5 units away from the starting point, zero.
Therefore, the blue point is 5 on the number line.
Learn more about the number line on:
brainly.com/question/24644930
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12x^4 +6 +2x^3 +1x -6x^2 -3
12x^4 +2x^3 -6x^2 +1x + 3
i'm not completely sure this is the right answer but i gave it a shot! let me know if i was right or wrong