4.5z-2.5z=-12

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Solution for 4.5z-2.5z=-12 equation: 



4.5z-2.5z=-12

We move all terms to the left:

4.5z-2.5z-(-12)=0

We add all the numbers together, and all the variables

2z+12=0

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

2z=-12

z=-12/2

z=-6

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