Solve for n
n>21
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28<7+n
Multiply both sides of the equation by 7. Since 7 is positive, the inequality direction remains the same.
7+n>28
Swap sides so that all variable terms are on the left hand side. This changes the sign direction.
n>28-7
Subtract 7 from both sides.
n>21
Subtract 7 from 28 to get 21.
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