Question

c) 20+{[(26-9)-√36÷3+3×18]-66{

Answer 1

$\large\sf{}20 + \{ \{\left(20 - 9\right) - \sqrt{36} \div 3 + 3 \times 18 \} - 66 \\ \\ \large\sf{}20 + \{17 - \sqrt{36} \div 3 + 3 \times 18 \} - 66 \\ \large\sf{}20 + \{17 - 6 \div 3 + 3 \times 18 \} - 66 \\ \large\sf{}20 + \{17 - 6 \div 3 + 54 \} - 66 \\ \large\sf{}20 + \{17 - 2 + 54 \} - 66 \\\large\sf{}20 + 69 - 66 \\\large\sf{}89 - 66 \\{\large\boxed{\boxed{  { \large \sf 23}}}}$

${\large\boxed{\boxed{  { \large \sf Bons~Estudos }}}}$