2z+9-7z=-11

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Solution for 2z+9-7z=-11 equation: 



2z+9-7z=-11

We move all terms to the left:

2z+9-7z-(-11)=0

We add all the numbers together, and all the variables

-5z+20=0

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

-5z=-20

z=-20/-5

z=+4

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