4z+5z=9

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Solution for 4z+5z=9 equation: 



4z+5z=9

We move all terms to the left:

4z+5z-(9)=0

We add all the numbers together, and all the variables

9z-9=0

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

9z=9

z=9/9

z=1

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