Question

7+(-12+43)-[2+(19-34)]

 

Answer 1

\(\Rightarrow7+31-\left[2+\left(-15\right)\right]\)

\(\Rightarrow7+31-\left(-13\right)=7+31+13=20+31=51\)

Answer 2

\(7+\left(-12+43\right)-\left[2+\left(19-34\right)\right]\)

\(=7+31-\left[2+\left(-15\right)\right]\)

\(=7+31-\left(-13\right)\)

\(=38+\left(-13\right)\)

\(=25\)