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5-z*1/2=3
We move all terms to the left:
5-z*1/2-(3)=0
We add all the numbers together, and all the variables
-z*1/2+2=0
We multiply all the terms by the denominator
-z*1+2*2=0
We add all the numbers together, and all the variables
-z*1+4=0
Wy multiply elements
-1z+4=0
We move all terms containing z to the left, all other terms to the right
-z=-4
z=-4/-1
z=+4
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