Question

50-{40-3x[5-(10-7)]}

Answer 1

50-{40-3x[5-(3)]}
50-{40-3x[2]}
50-{40-6}
50-32
18

Answer 2

= 50 - {40 - 3 . [ 5 - (10 - 7)]}

= 50 - { 40 - 3. [ 5 - (3)]}

= 50 - { 40 - 3. [ 5 - 3]}

= 50 - { 40 - 3. 2 }

= 50 - { 40 - 6}

= 50 - 34

= 16