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2.1=5.5z+5.4
We move all terms to the left:
2.1-(5.5z+5.4)=0
We get rid of parentheses
-5.5z-5.4+2.1=0
We add all the numbers together, and all the variables
-5.5z-3.3=0
We move all terms containing z to the left, all other terms to the right
-5.5z=3.3
z=3.3/-5.5
z=-2.5384615384615/4.2307692307692
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