Solve for n
n\geq 91
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13\times 7\leq n
Multiply both sides by 7. Since 7 is positive, the inequality direction remains the same.
91\leq n
Multiply 13 and 7 to get 91.
n\geq 91
Swap sides so that all variable terms are on the left hand side. This changes the sign direction.
Examples
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Matrix
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