20=-4(b-1)+8

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Solution for 20=-4(b-1)+8 equation:


20=-4(b-1)+8

We simplify the equation to the form, which is simple to understand 
20=-4(b-1)+8

Reorder the terms in parentheses
20=+(-4b+4)+8

Remove unnecessary parentheses
+20=-4b+4+8

We move all terms containing b to the left and all other terms to the right. 
+4b=+4+8-20

We simplify left and right side of the equation. 
+4b=-8

We divide both sides of the equation by 04 to get b. 
b=-2

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