-2z+4=-4z

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Solution for -2z+4=-4z equation: 



-2z+4=-4z

We move all terms to the left:

-2z+4-(-4z)=0

We get rid of parentheses

-2z+4z+4=0

We add all the numbers together, and all the variables

2z+4=0

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

2z=-4

z=-4/2

z=-2

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