everyone,l want the answed...thanks

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everyone,l want the answed...thanks

everyone,l want the answed...thanks
everyone,l want the answed...thanks
 

everyone,l want the answed...thanks
(4)-26-46y=8-56y
10y=34
y=3.4
(5)12-2y-2+y=1
y=9
(6) 5z-20-49+7z-9=12-27+3z
9z=63
z=7