Question

20-2(7-3) x {8-(6-7)}​

Answer 1

$20 - 2(7 - 3) \times {8 -(6 - 7)}$

$20 - 2(4) \times {8 - ( - 1)} \\ = 20 - 8 \times 8 + 1 \\ = 20 - 64 + 1 \\ = 21 - 64 \\ = - 43$

Answer 2

20−2(7−3)×8−(6−7)

\begin{gathered}20 - 2(4) \times {8 - ( - 1)} \\ = 20 - 8 \times 8 + 1 \\ = 20 - 64 + 1 \\ = 21 - 64 \\ = - 43\end{gathered}

20−2(4)×8−(−1)

=20−8×8+1

=20−64+1

=21−64

=−43