SOLUTION: I am an returning to college after a LONG hiatus from school.i encounted a problem in math that i have NO CLUE on how to solve. could u please break this down into something i can

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Question 671156: I am an returning to college after a LONG hiatus from school.i encounted a problem in math that i have NO CLUE on how to solve. could u please break this down into something i can understand?
(-2)+{5(-4)}-1
this was on placement testing and i was s=stumped...how do i solve problems with parentheses and brackets?
as I said,its been a while(i am older then most students)
thank you so much

Found 2 solutions by MathLover1, ewatrrr:
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

The rules for removing parentheses:
parentheses will be preceded either by a plus sign +
a+%2B+%28b+-c+%2B+d%29
or a minus sign -
a+-+%28b+-c+%2B+d%29
- when parentheses are preceded by a plus sign + simply remove them,
nothing changes

a+%2B+%28b+-c+%2B+d%29+=+a+%2B+b+-c+%2B+d

- when parentheses are preceded by a minus sign - change the sign
of every+term+within the parentheses

change + to - and - to + -

a+-%28b+-c+%2B+d%29+=+a+-+b+%2B+c-+d

use same rule with brackets

so, in your case %28-2%29%2B%285%28-4%29%29-1 first remove %28-2%29
parentheses...they are preceded by a plus sign +, you simply remove them

=-2%2B%285%28-4%29%29-1.......now multiply 5%28-4%29....recall +*-=-
=-2%2B%28-20%29-1........now remove %28-20%29 parentheses...they are preceded
by a plus sign +, you simply remove them

=-2-20-1.....now add all negative numbers just like they are positive and

place sign minus in front of their sum

=-23





Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 
Hi,
(-2)+{5(-4)}-1 same as
+-2+%2B+5%2A-4+-+1+=+-2+-20+-1+=+-23