Solve for a, b, c, d
d=30
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a=\frac{9}{10}
Consider the first equation. Subtract \frac{1}{10} from 1 to get \frac{9}{10}.
b=\frac{19}{20}
Consider the second equation. Subtract \frac{1}{20} from 1 to get \frac{19}{20}.
a=\frac{9}{10} b=\frac{19}{20} c=30 d=30
The system is now solved.
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