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12.4=8-4z
We move all terms to the left:
12.4-(8-4z)=0
We add all the numbers together, and all the variables
-(-4z+8)+12.4=0
We get rid of parentheses
4z-8+12.4=0
We add all the numbers together, and all the variables
4z+4.4=0
We move all terms containing z to the left, all other terms to the right
4z=-4.4
z=-4.4/4
z=-1+0.4/4
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