Solve for x
x=\frac{1}{75000}\approx 0.000013333
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3000=225000000x
Multiply 2500000 and 90 to get 225000000.
225000000x=3000
Swap sides so that all variable terms are on the left hand side.
x=\frac{3000}{225000000}
Divide both sides by 225000000.
x=\frac{1}{75000}
Reduce the fraction \frac{3000}{225000000} to lowest terms by extracting and canceling out 3000.
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