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3=z-2.7
We move all terms to the left:
3-(z-2.7)=0
We get rid of parentheses
-z+2.7+3=0
We add all the numbers together, and all the variables
-1z+5.7=0
We move all terms containing z to the left, all other terms to the right
-z=-5.7
z=-5.7/-1
z=5+0.7/1
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