Question

$86 \div 2 \times 9 - 7 \times (43 - 12) =$

Answer 1

   
[tex]\displaystyle\\ 86 : 2 \times 9 - 7 \times (43 - 12) = \\ =43 \times 9 - 7 \times 31= \\ =387-217 = \boxed{\bf170}[/tex]