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7z+4/7=8z+2/7
We move all terms to the left:
7z+4/7-(8z+2/7)=0
We add all the numbers together, and all the variables
7z-(+8z+2/7)+4/7=0
We get rid of parentheses
7z-8z-2/7+4/7=0
We multiply all the terms by the denominator
7z*7-8z*7-2+4=0
We add all the numbers together, and all the variables
7z*7-8z*7+2=0
Wy multiply elements
49z-56z+2=0
We add all the numbers together, and all the variables
-7z+2=0
We move all terms containing z to the left, all other terms to the right
-7z=-2
z=-2/-7
z=2/7
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