Question

Solve for the b 4 ( b + 5 )- 2b = 100

Answer 1

Answer:

$\tt b=40$

Step-by-step explanation:

$\tt 4 ( b + 5 )- 2b = 100$

$\bf Expand\; (Apply\; Distributions\; Law) :-$

$\tt 2b+20=100$

$\tt 2b+20-20=100-20\;\; (Subtract \;20\; from\; both \;sides)$

$\tt 2b=80$  $\tt (Simplify)$

$\tt \cfrac{2b}{2}=\cfrac{80}{2}\;\;( Divide\; both \;sides\: by\; 2)$

$\tt b=40$

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Answer 2

4 ( b + 5 )- 2b = 100

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B  =  40