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14.9=z-12.4
We move all terms to the left:
14.9-(z-12.4)=0
We get rid of parentheses
-z+12.4+14.9=0
We add all the numbers together, and all the variables
-1z+27.3=0
We move all terms containing z to the left, all other terms to the right
-z=-27.3
z=-27.3/-1
z=27+0.3/1
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