2z-4(2+1)=20

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Solution for 2z-4(2+1)=20 equation: 



2z-4(2+1)=20

We move all terms to the left:

2z-4(2+1)-(20)=0

determiningTheFunctionDomain
2z-20-4(2+1)=0

We add all the numbers together, and all the variables

2z-20-43=0

We add all the numbers together, and all the variables

2z-63=0

We move all terms containing z to the left, all other terms to the right

2z=63

z=63/2

z=31+1/2

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