-40=-4(5+b)

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Solution for -40=-4(5+b) equation:



-40=-4(5+b)
We move all terms to the left:
-40-(-4(5+b))=0
We add all the numbers together, and all the variables
-(-4(b+5))-40=0
We calculate terms in parentheses: -(-4(b+5)), so:
-4(b+5)
We multiply parentheses
-4b-20
Back to the equation:
-(-4b-20)
We get rid of parentheses
4b+20-40=0
We add all the numbers together, and all the variables
4b-20=0
We move all terms containing b to the left, all other terms to the right
4b=20
b=20/4
b=5

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