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3.3+(10-7.2)=z
We move all terms to the left:
3.3+(10-7.2)-(z)=0
We add all the numbers together, and all the variables
-z+3.3+(2.8)=0
We add all the numbers together, and all the variables
-1z+6.1=0
We move all terms containing z to the left, all other terms to the right
-z=-6.1
z=-6.1/-1
z=6+0.1/1
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