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2/5+1/2=1/2(n+4)
We simplify the equation to the form, which is simple to understand
2/5+1/2=1/2(n+4)
Reorder the terms in parentheses
+ 0.4 + 0.5=+( + 0.5n+2)
Remove unnecessary parentheses
+ 0.4 + 0.5=0.5n+2
We move all terms containing n to the left and all other terms to the right.
-0.5n=+2-0.4-0.5
We simplify left and right side of the equation.
-0.5n=+1.1
We divide both sides of the equation by -00.5 to get n.
n=-2.2
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