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:

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

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