-0.7z+0.4z=1.2

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Solution for -0.7z+0.4z=1.2 equation: 



-0.7z+0.4z=1.2

We move all terms to the left:

-0.7z+0.4z-(1.2)=0

We add all the numbers together, and all the variables

-0.3z-1.2=0

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

-0.3z=1.2

z=1.2/-0.3

z=-4

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