Answer:
s=5
Explanation:
As you can see, you have a whole block that is 20. Then you have another block that is broken down to 4 squares.
So....
4s=20
divide 4 to 4s
divide 4 by 20
so s=5
We have 4 s's that equal 20
Divide each side by 4
4s/4 =20/4
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