Solve for x
x=-\frac{1}{399}\approx -0.002506266
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1-x=\frac{400}{399}
Multiply 19 and 21 to get 399.
-x=\frac{400}{399}-1
Subtract 1 from both sides.
-x=\frac{400}{399}-\frac{399}{399}
Convert 1 to fraction \frac{399}{399}.
-x=\frac{400-399}{399}
Since \frac{400}{399} and \frac{399}{399} have the same denominator, subtract them by subtracting their numerators.
-x=\frac{1}{399}
Subtract 399 from 400 to get 1.
x=-\frac{1}{399}
Multiply both sides by -1.
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