1. **State the problem:** Complete the expression given values $x=7$, $p=3$, $q=9$, and $r=2$ for the expression $x - 9x + 4x \times (pqr)$. 2. **Write the expression:** The expression is $x - 9x + 4x \times (pqr)$. 3. **Calculate the product $pqr$:** $$pqr = 3 \times 9 \times 2 = 54$$ 4. **Substitute values into the expression:** $$7 - 9 \times 7 + 4 \times 7 \times 54$$ 5. **Calculate each term:** $$7 - 63 + 4 \times 7 \times 54$$ $$7 - 63 + 1512$$ 6. **Simplify the expression:** $$7 - 63 + 1512 = (7 - 63) + 1512 = -56 + 1512 = 1456$$ 7. **Final answer:** $$1456$$ The completed value of the expression is 1456.