Solve for n
n=10
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4n-10=30
Multiply both sides of the equation by 5.
4n=30+10
Add 10 to both sides.
4n=40
Add 30 and 10 to get 40.
n=\frac{40}{4}
Divide both sides by 4.
n=10
Divide 40 by 4 to get 10.
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