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(4500-z)/2500=0.25
We move all terms to the left:
(4500-z)/2500-(0.25)=0
We add all the numbers together, and all the variables
(-1z+4500)/2500-(0.25)=0
We add all the numbers together, and all the variables
(-1z+4500)/2500-0.25=0
We multiply all the terms by the denominator
(-1z+4500)-(0.25)*2500=0
We add all the numbers together, and all the variables
(-1z+4500)-625=0
We get rid of parentheses
-1z+4500-625=0
We add all the numbers together, and all the variables
-1z+3875=0
We move all terms containing z to the left, all other terms to the right
-z=-3875
z=-3875/-1
z=+3875
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