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Answer :

Bottom left:

Equal

Numbers:

3=3
3(2)=3(2)
6=6

Álgebra:

10=1/2x
(2)10=1/2(2)x
20=x

Top right:

Subtract

Numbers:

4=4
4-2=4-2
2=2

Álgebra:

x+6=9
x+6-6=9-6
x=3

Bottom right

Divide

Numbers:

9=9
9/3=9/3
3=3

Algebra:

3x=30
3x/3=30/3
x=10

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