2z+2z=21+3

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Solution for 2z+2z=21+3 equation: 



2z+2z=21+3

We move all terms to the left:

2z+2z-(21+3)=0

We add all the numbers together, and all the variables

2z+2z-24=0

We add all the numbers together, and all the variables

4z-24=0

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

4z=24

z=24/4

z=6

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