Question

{[(8.4+3)÷7+(3+15÷5).3].2-(19-7)÷6).2+12 ??

Answer 1

Resolvendo:

$\{[(8 \cdot 4+3):7+(3+15:5) \cdot 3] \cdot 2-(19-7):6\} \cdot 2+12=$
$=\{[(32+3):7+(3+3) \cdot 3] \cdot 2-(12):6\} \cdot 2+12=$
$=\{[(35):7+(6) \cdot 3] \cdot 2-2\} \cdot 2+12=$
$=\{[5+18] \cdot 2-2\} \cdot 2+12=$
$=\{[23] \cdot 2-2\} \cdot 2+12=$
$=\{46-2\} \cdot 2+12=$
$=\{44\} \cdot 2+12=$
$=88+12=100$