Question

-(39 +228 - 407) + (118 - 161)

Answer 1

\(-\left(39+228-407\right)+\left(118-161\right)\)
\(=-39-228+407+118-161\)
\(=\left(-39-161\right)-\left(228-118\right)+407\)
\(=-200-200+407\)
\(=-400+407\)
\(=407-400\)
\(=7\)

Answer 2

-(39 + 228 - 407) + (118-161)

= -39 - 228 + 407 + 118 - 161

=(-39 - 161) - (228 - 118) + 407

=-200 - 200 + 407

=-400 + 407

= 7