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\frac{0.618}{12.04}\times 100=\left(732-721\right)z
Subtract 11.422 from 12.04 to get 0.618.
\frac{618}{12040}\times 100=\left(732-721\right)z
Expand \frac{0.618}{12.04} by multiplying both numerator and the denominator by 1000.
\frac{309}{6020}\times 100=\left(732-721\right)z
Reduce the fraction \frac{618}{12040} to lowest terms by extracting and canceling out 2.
\frac{309\times 100}{6020}=\left(732-721\right)z
Express \frac{309}{6020}\times 100 as a single fraction.
\frac{30900}{6020}=\left(732-721\right)z
Multiply 309 and 100 to get 30900.
\frac{1545}{301}=\left(732-721\right)z
Reduce the fraction \frac{30900}{6020} to lowest terms by extracting and canceling out 20.
\frac{1545}{301}=11z
Subtract 721 from 732 to get 11.
11z=\frac{1545}{301}
Swap sides so that all variable terms are on the left hand side.
z=\frac{\frac{1545}{301}}{11}
Divide both sides by 11.
z=\frac{1545}{301\times 11}
Express \frac{\frac{1545}{301}}{11} as a single fraction.
z=\frac{1545}{3311}
Multiply 301 and 11 to get 3311.