# Appendix - Extra Word Problems - Page 523: 2

25

#### Work Step by Step

Let the certain number here be $x$. Since six subtracted from a certain number produces 19, we obtain: $x-6=19$ Now, solving the above equation, we obtain: $x-6=19$ $x-6+6=19+6$ $x=25$ Therefore, the unknown number is $25$.

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