20-4z=-12

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Solution for 20-4z=-12 equation: 



20-4z=-12

We move all terms to the left:

20-4z-(-12)=0

We add all the numbers together, and all the variables

-4z+32=0

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

-4z=-32

z=-32/-4

z=+8

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