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-9=.50(4-y)
We simplify the equation to the form, which is simple to understand
-9=.50(4-y)
Reorder the terms in parentheses
-9=+(+2-0.5y)
Remove unnecessary parentheses
-9=+2-0.5y
We move all terms containing y to the left and all other terms to the right.
+ 0.5y=+2+9
We simplify left and right side of the equation.
+ 0.5y=+11
We divide both sides of the equation by 00.5 to get y.
y=22
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