# 20=1/2*b*4

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## Solution for 20=1/2*b*4 equation:

20=1/2b*4
We move all terms to the left:
20-(1/2b*4)=0

Domain of the equation: 2b*4)!=0
b!=0/1
b!=0
b∈R

We add all the numbers together, and all the variables
-(+1/2b*4)+20=0
We get rid of parentheses
-1/2b*4+20=0
We multiply all the terms by the denominator

20*2b*4-1=0
Wy multiply elements
160b*4-1=0
Wy multiply elements
640b-1=0
We move all terms containing b to the left, all other terms to the right
640b=1
b=1/640
b=1/640

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