Question

6.3
4
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Answer 1

Answer:

Step-by-step explanation:

The general equation as we can see from the diagram is :

r+r+r+r+r+3=21

So if we add all r it becomes :

5×r + 3 =21 --> 5r + 3 =21

Taking 3 on other side we get :

5r = 21 - 3

And as we know equality stands on both side so if x = y we can also say that y = x .

Answer for this problem is :

a.

d.

e.

f.