Solve for u
u = \frac{91}{11} = 8\frac{3}{11} \approx 8.272727273
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13\times 7=11u
Variable u cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 13u, the least common multiple of u,13.
91=11u
Multiply 13 and 7 to get 91.
11u=91
Swap sides so that all variable terms are on the left hand side.
u=\frac{91}{11}
Divide both sides by 11.
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