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10(z-9)=-4
We move all terms to the left:
10(z-9)-(-4)=0
We add all the numbers together, and all the variables
10(z-9)+4=0
We multiply parentheses
10z-90+4=0
We add all the numbers together, and all the variables
10z-86=0
We move all terms containing z to the left, all other terms to the right
10z=86
z=86/10
z=8+3/5
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