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1.3z=6.9
We move all terms to the left:
1.3z-(6.9)=0
We add all the numbers together, and all the variables
1.3z-6.9=0
We move all terms containing z to the left, all other terms to the right
1.3z=6.9
z=6.9/1.3
z=5+0.4/1.3
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