3z+z=12+20

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Solution for 3z+z=12+20 equation: 



3z+z=12+20

We move all terms to the left:

3z+z-(12+20)=0

We add all the numbers together, and all the variables

3z+z-32=0

We add all the numbers together, and all the variables

4z-32=0

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

4z=32

z=32/4

z=8

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