4z-9=3.5z-9

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Solution for 4z-9=3.5z-9 equation: 



4z-9=3.5z-9

We move all terms to the left:

4z-9-(3.5z-9)=0

We get rid of parentheses

4z-3.5z+9-9=0

We add all the numbers together, and all the variables

0.5z=0

z=0/0.5

z=0

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