-84= -4b-4(-7-8b) solve for b

1 answer:

4 0

-84= -4b -4(-7 -8b)
⇒ -84= -4b -4* (-7) -4*(-8b) (distributive property)
⇒ -84= -4b+ 28+ 32b
⇒ -84 -28= 32b -4b
⇒ -112= 28b
⇒ -112/28= b (inverse operation)
⇒ -4= b

Final answer: b= -4

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Step-by-step explanation:

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