How do you simplify #7{ [3( b - 4) + 18] - [ 2( 5b - 2) + 3]}#?

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Answer 1 · 2018-04-23T02:28:22

We always start from the inner parentheses to the outer ones:

#-49b+49#

Let's start from the inner parentheses:

#3(b-4)=3b-12#

#2(5b-2)=10b-4#

Next step:

#3b-12+18=3b+6#

#10b-4+3=10b-1#

#=3b+6-10b+1#

#=-7b+7#

Then:

#7(-7b+7)=-49b+49#