-3b+5b=9-25
2b=-16
b=-8
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3+11y=203+y
11y-y=203-3
10y=200
y=20
___________________________________________________________
3•(4x-8)=3x-6
12x-24=3x-6
12x-3x=-6+24
9x=18
x=2
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-4•(-z+7)=z+17
4z-28=z+17
4z-z=17+28
3z=45
z=15