Question

$a = \frac{12 + 20}{2} \times 4 =$
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Answer 1

    Olá!

      ↓

$\alpha =\frac{12 + 20}{2} *4$

$\alpha =\frac{32}{2} *4$

$\alpha = 16 * 4$

$\alpha = 64$

espero ter ajudado!