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-7.6-4z-7.2-z=-4z-8.7
We move all terms to the left:
-7.6-4z-7.2-z-(-4z-8.7)=0
We add all the numbers together, and all the variables
-5z-(-4z-8.7)-14.8=0
We get rid of parentheses
-5z+4z+8.7-14.8=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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