21+4z=61

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Solution for 21+4z=61 equation: 



21+4z=61

We move all terms to the left:

21+4z-(61)=0

We add all the numbers together, and all the variables

4z-40=0

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

4z=40

z=40/4

z=10

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