3z+9=5z-12

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Solution for 3z+9=5z-12 equation: 



3z+9=5z-12

We move all terms to the left:

3z+9-(5z-12)=0

We get rid of parentheses

3z-5z+12+9=0

We add all the numbers together, and all the variables

-2z+21=0

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

-2z=-21

z=-21/-2

z=10+1/2

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