Question

The most inner parenthetical term confuses me... 5+2 [10 (5•3-10)-30] =

Answer 1

5 + 2[ 10( 5 · 3 – 10 ) – 30 ]

= 5 + 2[ 10( 15 – 10 ) – 30 ]

= 5 + 2[ 10( 5 ) – 30 ]

= 5 + 2[ 50 – 30 ]

= 5 + 2[ 20 ]

= 5 + 40

= 45  <———  this is the answer.


I hope this helps. =)